Listening to loud music at rock concerts __________caused hearing loss in some teenagers．A.isB.areC.hasD.have
Listening to loud music at rock concerts __________caused hearing loss in some teenagers．
A.is
B.are
C.has
D.have
B.are
C.has
D.have
参考解析
解析：考查主谓一致。动名词作主语，句子的谓语动词用单数形式，由此排除B、D两项，根据主句与caused的主动关系，排除A项。故选C。
相关考题：
91 Listening involves more than hearing sounds. The good listenerA. Repeats some of the things saidB. Finishes the speaker's sentencesC. Writes everything downD. Nods his head frequently
Listening to loud music at rock concerts caused hearing loss in some teenagers.A. isB. areC. hasD. have
The new music was built out of materials already in______. (exist)：blues，rock'n'roll，folk music.
The greatest danger is fatigue at the wheel. Some music can ________ you into concentration loss.A contributeB lullC causeD conduce
According to one rock music critic, the teenagers express their rebellious attitudes through rock music.()
材料:Some older decisions have held that the carrier，in order to rebut the presumption of liability resulting from the arrival in damaged condition of GOODs shipped undamaged，must prove not only that the loss or damage was caused by one of the excepted perils，but also that the harm did not result from any negligence on the carriers part．Most more recent decisions and authors，however，uphold the view that，in general，the carrier may rebut the claimants prima facie case simply by proving that the loss was caused by an excepted peril．At that point，the onus switches to the cargo claimant to prove that the true cause of the loss was the carriers negligence．Nevertheless certain Hague and Hague/Visby Rules exceptions，expressly or implicitly，also require the carrier to negative its own negligence in proving the exception itself．For example，a clause in the said rules expressly imposes on the carrier the burden of proving that the loss or damage occurred without its actual fault or privity and without any fault or neglect on the part of its servants or agents．The carrier，however，must truly prove the existence of one or more of the exceptions and their causative role in respect of the loss or damage．Conjectures and speculation do not take the place of hard evidence．A court has held：“Mere speculation will not overcome the prima facie evidence of a clean bill of lading”．问题：The carrier will be held liable for the loss or damage if _______．A.it is proved that he has privity to the loss or damageB.it is proved that the fault or neglect on his part is not the true cause of the loss or damageC.it is too onerous for him to demonstrate that the loss or damage is caused by what is beyond his controlD.if there are conjectures and speculationIn accordance with old decisions，the carrier will not be excused unless he has proved that _______．A.not only the loss or damage was caused by one of the excepted perils，but also that the harm did not result from any negligence on the his partB.the loss or damage was caused by one of the excepted perilsC.the harm did not result from any negligence on his partD.there are conjectures and speculationIn accordance with most more recent decisions and authors，the carrier will not be excused unless he has proved that _______．A.not only the loss or damage was caused by one of the excepted perils，but also that the harm did not result from any negligence on the his partB.the loss or damage was caused by one of the excepted perilsC.the harm did not result from any negligence on his partD.there are conjectures and speculationIt is concluded that _______．A.The carrier is not in a position to prove the loss or damage is substantially caused by one or more of the excepted perilsB.It can not be decided that whether the carrier has to prove the loss or damage is substantially caused by one or more of the excepted perils because there are some differences between the decisions and authors and requirements of Hague and Hague/Visby RulesC.The carrier does not have to prove the loss or damage is substantially caused by one or more of the excepted perils due to the fact that there are some differences between the decisions and authors and requirements of Hague and Hague/Visby RulesD.The carrier must truly prove the loss or damage is substantially caused by one or more of the excepted perils even there are some differences between the decisions and authors and requirements of Hague and Hague/Visby Rules请帮忙给出每个问题的正确答案和分析，谢谢！
Listening to loud music at rock concerts__________caused hearing toss in some teenagers.A.isB.areC.hasD.have
共用题干Can Loud Music Cause Hearing Impairment（损伤）?Have you ever gone to a concert and realized that your seats were right next to thebooming speakers?Are you guilty_________(1)turning up the volume on your portablecassette or CD player to drown out the whining（哭哭啼啼）of your little brother? Sometimes it's difficult to avoid loud music or noises,but they can be bad news because loud noises can_________(2)temporary or permanent hearing loss.Extremely loud music and noises that go on for long periods of_______(3)are common causes of deafness.If a noise is so loud that you have to shout to make yourself_______(4),there is a______(5)that the mechanism inside your ear can beinjured.Temporary hearing loss can happen after you've been_______(6)to loud noise for only 15 minutes.If you have temporary hearing loss,you won't be able to hear as________ (7) as you normally can, and you may have tinnitus（耳鸣）,which is afancy word for ringing in the ears. Your ears can feel"full",too._________（8),these things usually go away and your hearing soon returns to normal.Permanent hearing loss can happen when someone is exposed to loud noise ________(9)and over. Construction workers and people who work in factories must ________(10)ear protectors because the equipment they use can be extremely loud. But even some lawn mowers（割草机）and power tools can permanently__________ (11)a person's ability to hear high-pitched noises and can also give him permanent tinnitus. Listening to extremely loud music over and over can also have the same effect on a person's ______(12).And using headphones on a portable cassette or CD player can be dangerous________(13)if the volume is too high and the headphones are used a lot, the noise can damage the ears.The best way to avoid hearing loss is to wear ear protectors when working with machinery and earplugs when going to a_________(14).Headphones are OK to wear when you're listening to music;just be sure the volume isn't too high,and give them a rest________(15)once in a while._________(8.)A: Unfortunately B: Accordingly C: Luckily D: Unexpectedly
共用题干Can Loud Music Cause Hearing Impairment（损伤）?Have you ever gone to a concert and realized that your seats were right next to thebooming speakers?Are you guilty_________(1)turning up the volume on your portablecassette or CD player to drown out the whining（哭哭啼啼）of your little brother? Sometimes it's difficult to avoid loud music or noises,but they can be bad news because loud noises can_________(2)temporary or permanent hearing loss.Extremely loud music and noises that go on for long periods of_______(3)are common causes of deafness.If a noise is so loud that you have to shout to make yourself_______(4),there is a______(5)that the mechanism inside your ear can beinjured.Temporary hearing loss can happen after you've been_______(6)to loud noise for only 15 minutes.If you have temporary hearing loss,you won't be able to hear as________ (7) as you normally can, and you may have tinnitus（耳鸣）,which is afancy word for ringing in the ears. Your ears can feel"full",too._________（8),these things usually go away and your hearing soon returns to normal.Permanent hearing loss can happen when someone is exposed to loud noise ________(9)and over. Construction workers and people who work in factories must ________(10)ear protectors because the equipment they use can be extremely loud. But even some lawn mowers（割草机）and power tools can permanently__________ (11)a person's ability to hear high-pitched noises and can also give him permanent tinnitus. Listening to extremely loud music over and over can also have the same effect on a person's ______(12).And using headphones on a portable cassette or CD player can be dangerous________(13)if the volume is too high and the headphones are used a lot, the noise can damage the ears.The best way to avoid hearing loss is to wear ear protectors when working with machinery and earplugs when going to a_________(14).Headphones are OK to wear when you're listening to music;just be sure the volume isn't too high,and give them a rest________(15)once in a while._________(2) A: have B:take C: cause D:tap
共用题干Can Loud Music Cause Hearing Impairment（损伤）?Have you ever gone to a concert and realized that your seats were right next to thebooming speakers?Are you guilty_________(1)turning up the volume on your portablecassette or CD player to drown out the whining（哭哭啼啼）of your little brother? Sometimes it's difficult to avoid loud music or noises,but they can be bad news because loud noises can_________(2)temporary or permanent hearing loss.Extremely loud music and noises that go on for long periods of_______(3)are common causes of deafness.If a noise is so loud that you have to shout to make yourself_______(4),there is a______(5)that the mechanism inside your ear can beinjured.Temporary hearing loss can happen after you've been_______(6)to loud noise for only 15 minutes.If you have temporary hearing loss,you won't be able to hear as________ (7) as you normally can, and you may have tinnitus（耳鸣）,which is afancy word for ringing in the ears. Your ears can feel"full",too._________（8),these things usually go away and your hearing soon returns to normal.Permanent hearing loss can happen when someone is exposed to loud noise ________(9)and over. Construction workers and people who work in factories must ________(10)ear protectors because the equipment they use can be extremely loud. But even some lawn mowers（割草机）and power tools can permanently__________ (11)a person's ability to hear high-pitched noises and can also give him permanent tinnitus. Listening to extremely loud music over and over can also have the same effect on a person's ______(12).And using headphones on a portable cassette or CD player can be dangerous________(13)if the volume is too high and the headphones are used a lot, the noise can damage the ears.The best way to avoid hearing loss is to wear ear protectors when working with machinery and earplugs when going to a_________(14).Headphones are OK to wear when you're listening to music;just be sure the volume isn't too high,and give them a rest________(15)once in a while._________(12) A:scope B:attitude C:survey D:hearing
共用题干Music and DrivingListening to loud music while driving can seriously hamper reaction times and cause accidents,new research suggests.A Canadian study found people took up to 20% longer to perform physical and mental tasks to loud music .If motorists were delayed that long at the wheel they could suffer a fatal crash, warned the RAG Foundation,a British motoring organization.Edmund King,the RACFoundation's executive director,said the study showed that"not only is loud music a nuisance to other,it could also be the cause of accidents".Earlier research by the RAG Foundation found drivers were twice as likely to skip a red light while listening to music.In the Canadian study volunteers carried out tasks while listening to levels of noise varying from 53 decibels(equivalent to an office environment)to 95 decibels(equivalent to an oil rig).Researchers found reactions to be significantly decreased at higher noise levels for both physical and mental work.At 95 decibels reaction times to tasks that involve decision making plummeted（骤然减少）by 20%.Edmund King said:" The findings of the Canadian study are bad news for decibel-loving drivers,as they prove that not only is loud music a nuisance to others,it could also be the cause of accidents on the roads."Drivers are at even greater risk if they listen to music with a pounding beat rather than more relaxed tunes,according to experts.Conrad King,consultant psychologist to the foundation,said:"It is important that drivers choose their music carefully when driving,as up-tempo music has been shown to cause drivers to have double the amount of accidents as those listening to slower music."In general,if music is ahove 60 beats per minute,listeners experience a faster rate and increased blood pressure."It doesn't matter if you listen to opera,classical or the latest rave music.It's the speed of the beat that counts." According to scientific research,people may spend more time doing physical work if listening to loud music while doing the task.A: RightB: WrongC: Not mentioned
共用题干Music and DrivingListening to loud music while driving can seriously hamper reaction times and cause accidents,new research suggests.A Canadian study found people took up to 20% longer to perform physical and mental tasks to loud music .If motorists were delayed that long at the wheel they could suffer a fatal crash, warned the RAG Foundation,a British motoring organization.Edmund King,the RACFoundation's executive director,said the study showed that"not only is loud music a nuisance to other,it could also be the cause of accidents".Earlier research by the RAG Foundation found drivers were twice as likely to skip a red light while listening to music.In the Canadian study volunteers carried out tasks while listening to levels of noise varying from 53 decibels(equivalent to an office environment)to 95 decibels(equivalent to an oil rig).Researchers found reactions to be significantly decreased at higher noise levels for both physical and mental work.At 95 decibels reaction times to tasks that involve decision making plummeted（骤然减少）by 20%.Edmund King said:" The findings of the Canadian study are bad news for decibel-loving drivers,as they prove that not only is loud music a nuisance to others,it could also be the cause of accidents on the roads."Drivers are at even greater risk if they listen to music with a pounding beat rather than more relaxed tunes,according to experts.Conrad King,consultant psychologist to the foundation,said:"It is important that drivers choose their music carefully when driving,as up-tempo music has been shown to cause drivers to have double the amount of accidents as those listening to slower music."In general,if music is ahove 60 beats per minute,listeners experience a faster rate and increased blood pressure."It doesn't matter if you listen to opera,classical or the latest rave music.It's the speed of the beat that counts." Edmund King believes that loud music will do no harm to drivers.A: RightB: WrongC: Not mentioned
共用题干Music and DrivingListening to loud music while driving can seriously hamper reaction times and cause accidents,new research suggests.A Canadian study found people took up to 20% longer to perform physical and mental tasks to loud music .If motorists were delayed that long at the wheel they could suffer a fatal crash, warned the RAG Foundation,a British motoring organization.Edmund King,the RACFoundation's executive director,said the study showed that"not only is loud music a nuisance to other,it could also be the cause of accidents".Earlier research by the RAG Foundation found drivers were twice as likely to skip a red light while listening to music.In the Canadian study volunteers carried out tasks while listening to levels of noise varying from 53 decibels(equivalent to an office environment)to 95 decibels(equivalent to an oil rig).Researchers found reactions to be significantly decreased at higher noise levels for both physical and mental work.At 95 decibels reaction times to tasks that involve decision making plummeted（骤然减少）by 20%.Edmund King said:" The findings of the Canadian study are bad news for decibel-loving drivers,as they prove that not only is loud music a nuisance to others,it could also be the cause of accidents on the roads."Drivers are at even greater risk if they listen to music with a pounding beat rather than more relaxed tunes,according to experts.Conrad King,consultant psychologist to the foundation,said:"It is important that drivers choose their music carefully when driving,as up-tempo music has been shown to cause drivers to have double the amount of accidents as those listening to slower music."In general,if music is ahove 60 beats per minute,listeners experience a faster rate and increased blood pressure."It doesn't matter if you listen to opera,classical or the latest rave music.It's the speed of the beat that counts." Conrad King suggests that drivers be careful when choosing the music.A: RightB: WrongC: Not mentioned
共用题干Music and DrivingListening to loud music while driving can seriously hamper reaction times and cause accidents,new research suggests.A Canadian study found people took up to 20% longer to perform physical and mental tasks to loud music .If motorists were delayed that long at the wheel they could suffer a fatal crash, warned the RAG Foundation,a British motoring organization.Edmund King,the RACFoundation's executive director,said the study showed that"not only is loud music a nuisance to other,it could also be the cause of accidents".Earlier research by the RAG Foundation found drivers were twice as likely to skip a red light while listening to music.In the Canadian study volunteers carried out tasks while listening to levels of noise varying from 53 decibels(equivalent to an office environment)to 95 decibels(equivalent to an oil rig).Researchers found reactions to be significantly decreased at higher noise levels for both physical and mental work.At 95 decibels reaction times to tasks that involve decision making plummeted（骤然减少）by 20%.Edmund King said:" The findings of the Canadian study are bad news for decibel-loving drivers,as they prove that not only is loud music a nuisance to others,it could also be the cause of accidents on the roads."Drivers are at even greater risk if they listen to music with a pounding beat rather than more relaxed tunes,according to experts.Conrad King,consultant psychologist to the foundation,said:"It is important that drivers choose their music carefully when driving,as up-tempo music has been shown to cause drivers to have double the amount of accidents as those listening to slower music."In general,if music is ahove 60 beats per minute,listeners experience a faster rate and increased blood pressure."It doesn't matter if you listen to opera,classical or the latest rave music.It's the speed of the beat that counts." It can be concluded that speed of the beat is the most important criterion when choosing the music for a driver.A: RightB: WrongC: Not mentioned
共用题干Music and DrivingListening to loud music while driving can seriously hamper reaction times and cause accidents,new research suggests.A Canadian study found people took up to 20% longer to perform physical and mental tasks to loud music .If motorists were delayed that long at the wheel they could suffer a fatal crash, warned the RAG Foundation,a British motoring organization.Edmund King,the RACFoundation's executive director,said the study showed that"not only is loud music a nuisance to other,it could also be the cause of accidents".Earlier research by the RAG Foundation found drivers were twice as likely to skip a red light while listening to music.In the Canadian study volunteers carried out tasks while listening to levels of noise varying from 53 decibels(equivalent to an office environment)to 95 decibels(equivalent to an oil rig).Researchers found reactions to be significantly decreased at higher noise levels for both physical and mental work.At 95 decibels reaction times to tasks that involve decision making plummeted（骤然减少）by 20%.Edmund King said:" The findings of the Canadian study are bad news for decibel-loving drivers,as they prove that not only is loud music a nuisance to others,it could also be the cause of accidents on the roads."Drivers are at even greater risk if they listen to music with a pounding beat rather than more relaxed tunes,according to experts.Conrad King,consultant psychologist to the foundation,said:"It is important that drivers choose their music carefully when driving,as up-tempo music has been shown to cause drivers to have double the amount of accidents as those listening to slower music."In general,if music is ahove 60 beats per minute,listeners experience a faster rate and increased blood pressure."It doesn't matter if you listen to opera,classical or the latest rave music.It's the speed of the beat that counts." Listening to the Jazz music can help drivers relax.A: RightB: WrongC:Not mentioned
共用题干Music and DrivingListening to loud music while driving can seriously hamper reaction times and cause accidents,new research suggests.A Canadian study found people took up to 20% longer to perform physical and mental tasks to loud music .If motorists were delayed that long at the wheel they could suffer a fatal crash, warned the RAG Foundation,a British motoring organization.Edmund King,the RACFoundation's executive director,said the study showed that"not only is loud music a nuisance to other,it could also be the cause of accidents".Earlier research by the RAG Foundation found drivers were twice as likely to skip a red light while listening to music.In the Canadian study volunteers carried out tasks while listening to levels of noise varying from 53 decibels(equivalent to an office environment)to 95 decibels(equivalent to an oil rig).Researchers found reactions to be significantly decreased at higher noise levels for both physical and mental work.At 95 decibels reaction times to tasks that involve decision making plummeted（骤然减少）by 20%.Edmund King said:" The findings of the Canadian study are bad news for decibel-loving drivers,as they prove that not only is loud music a nuisance to others,it could also be the cause of accidents on the roads."Drivers are at even greater risk if they listen to music with a pounding beat rather than more relaxed tunes,according to experts.Conrad King,consultant psychologist to the foundation,said:"It is important that drivers choose their music carefully when driving,as up-tempo music has been shown to cause drivers to have double the amount of accidents as those listening to slower music."In general,if music is ahove 60 beats per minute,listeners experience a faster rate and increased blood pressure."It doesn't matter if you listen to opera,classical or the latest rave music.It's the speed of the beat that counts." At 95 decibels,people's reaction to decision making decreased by 53%.A: RightB: WrongC: Not mentioned
共用题干Just one hour's listening to an MP3 player can damage hearing,claim scientists.It causes temporary changes in hearing sensitivity which may lead to long-term harm,according to a new study.The findings show over -stimulation of hair cells within the ear occurs even at varying volume levels for short periods of time.The study of almost 60 young people carried out by researchers at Ghent University,Belgium,is published in the Archives of Otolaryngology -Head&Neck Surgery journal.It follows previous warnings from doctors that using MP3 players at high volumes with earphones that fit into the ear canal could lead to loss of hearing. In the latest study,21 people aged 19 to 28 years were exposed to pop and rock music using MP3 players at varying volumes for one hour. A second group of 28 men and women were a control group who were not exposed to MP3 music.Hearing tests were carried out before and after the exposure,which found significant threshold or emission shifts were observed between almost every session of the noise exposure group compared with the control group.Lead researcher Hannah Kempler said:Excessive noise exposure can lead to metabolic and mechanical effects resulting in alterations of the structural elements of the inner ear that contains auditory sensory cells or"hair cells".The European Commission has warned up to 10% of 30-year-old would have to wear a hearing device within the next decade because they listen to music too loudly through headphones.Surveys showed more than 90% of young people in Europe and the U.S.used MP3 players,often for several hours a day at maximum volume.Hearing experts recommend the 60/60 rule一listening to MP3 players for no more than 60 minutes at a time at 60% of maximum volume.Concern among EU health and safety officials has led to plan to ensure all MP3 players have the same maximum volume of 85 decibels(dB)一although users may be able to individually override it at their own risk. MP3 player can't damage hearing when one listens to MP3 music for only 60 minutes.A:Right B:Wrong C: Not mentioned
共用题干Just one hour's listening to an MP3 player can damage hearing,claim scientists.It causes temporary changes in hearing sensitivity which may lead to long-term harm,according to a new study.The findings show over -stimulation of hair cells within the ear occurs even at varying volume levels for short periods of time.The study of almost 60 young people carried out by researchers at Ghent University,Belgium,is published in the Archives of Otolaryngology -Head&Neck Surgery journal.It follows previous warnings from doctors that using MP3 players at high volumes with earphones that fit into the ear canal could lead to loss of hearing. In the latest study,21 people aged 19 to 28 years were exposed to pop and rock music using MP3 players at varying volumes for one hour. A second group of 28 men and women were a control group who were not exposed to MP3 music.Hearing tests were carried out before and after the exposure,which found significant threshold or emission shifts were observed between almost every session of the noise exposure group compared with the control group.Lead researcher Hannah Kempler said:Excessive noise exposure can lead to metabolic and mechanical effects resulting in alterations of the structural elements of the inner ear that contains auditory sensory cells or"hair cells".The European Commission has warned up to 10% of 30-year-old would have to wear a hearing device within the next decade because they listen to music too loudly through headphones.Surveys showed more than 90% of young people in Europe and the U.S.used MP3 players,often for several hours a day at maximum volume.Hearing experts recommend the 60/60 rule一listening to MP3 players for no more than 60 minutes at a time at 60% of maximum volume.Concern among EU health and safety officials has led to plan to ensure all MP3 players have the same maximum volume of 85 decibels(dB)一although users may be able to individually override it at their own risk. Not much difference was found between the exposure group and the control group according to the hearing tests after the exposure.A:Right B:Wrong C:Not mentioned
Life gets noisier every day and very few people can free from noise of some sort or another.It doesn′t matter where you live--in the middle of a modem city,or a faraway village--the chances that you will be disturbed by jet aero planes,transistor radios,oil powered engines,etc.,are almost everywhere.We seem to be getting used to noise,too.Some people feel quite lonely without background music while they are working.Scientific tests have shown that total silence can be very frightening experience for human beings.However,some people enjoy listening to pop music which is very loud,and this can do harm to their eardrums（耳鼓）.The noise level in some disco is far above the usual safety level for heavy industrial areas.One recent report about noise and concentration（专心）suggested that although a lot of people say that any noise disturbs their concentration,what really affects their ability to concentrate is a change in the level of noise.It goes on to say that a background noise,which doesn′t change too much（music,for example）may even help people to concentrate."Background music"in the passage meansA.music played in the concertB.a kind of noise coming into your earsC.music which helps people to concentrateD.music played while people are working
Life gets noisier every day and very few people can free from noise of some sort or another.It doesn′t matter where you live--in the middle of a modem city,or a faraway village--the chances that you will be disturbed by jet aero planes,transistor radios,oil powered engines,etc.,are almost everywhere.We seem to be getting used to noise,too.Some people feel quite lonely without background music while they are working.Scientific tests have shown that total silence can be very frightening experience for human beings.However,some people enjoy listening to pop music which is very loud,and this can do harm to their eardrums（耳鼓）.The noise level in some disco is far above the usual safety level for heavy industrial areas.One recent report about noise and concentration（专心）suggested that although a lot of people say that any noise disturbs their concentration,what really affects their ability to concentrate is a change in the level of noise.It goes on to say that a background noise,which doesn′t change too much（music,for example）may even help people to concentrate.Some people may have their hearing hurtA.while they are in complete silenceB.while they are dancing violentlyC.while they are listening to pop musicD.while they are listening to soft music
The music was so loud that she had to raise her voice to make herself（）A、hearB、heardC、to hearD、hearing
Small in-ceiling speakers are BEST suited for（）A、loud， bass intensive music （e.g. heavy metal， rock）.B、providing a sub-woofer for great bass reproduction.C、background music and blending in with decor.D、the user who wants perfect sound reproduction.
问答题One of America’s most important export is her modern music. (1) _______American popular music is playing all over the world. It is enjoyed (2) _______by people of all ages in all countries. Because the lyrics are English, (3) _______nevertheless people not speaking English enjoy it. The reasons forits popularity are its fast pace and rhythmic beat. The music has many origins in the United States. Country music,coming from the suburban areas in the southern United States, is one (4) _______source. Country music features simple themes and melodies describingday-to-day situations and the feelings of country people. Many peopleappreciate this music because the emotions expressed by country (5) _______music songs. A second origin of American popular music is the blues. It depicted (6) _______mostly sad feelings reflecting the difficult lives of American blacks. Itis usually played and sung by black musicians, but it is not popular with (7) _______all Americans. Rock music is a newer form of music. This music style, featuringfast and repetitious rhythms, was influenced by the blues and countrymusic. It is first known as rock-and-roll in the 1950s. Since then there (8) _______have been many forms of rock music, hard rock, soft rock, punk rock,disco music and others. Many performers of popular rock music areyoung musicians. American popular music is marketed to a demanding audience.Now popular songs are heard on the radio several times a day. Somesongs become popular all over the world. People hear these songs sing (9) _______in their original English or sometimes translated into other languages.The words may coincide but the enjoyment of the music is universal. (10) _______
单选题Rock music was original a mixture of country music and rhythm and blues.AoriginalBa mixtureCrhythmDand