单选题We confirm ____ purchased 2,000 MP3 Players ____ you.Ahave, toBhaving, fromCto have, fromDhave been to
单选题
We confirm ____ purchased 2,000 MP3 Players ____ you.
A
have, to
B
having, from
C
to have, from
D
have been to
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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. A control group refers to people with limited exposure to MP3 player.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. According to the surveys,most young people in both Europe and the U.S.used MP3 players for too long hours at maximum volume.A:Right B:Wrong C:Not mentioned
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We hereby register a claim with you（）the basis of here,we can obtain a number of orders for you.
We ____ allow you a 3% quantity discount(折扣) if your order exceeds 2,000 dozen.A、are preparedB、are prepared toC、will be preparedD、will prepare
We confirm（）your order No.7891 dated May 10，1990.A、to have receivedB、having receivedC、receivingD、toreceive
翻译：If your quality is good and the price is suitable for our market, we would consider signing a long-term contract with you.
We confirm ____ purchased 2,000 MP3 Players ____ you.A、have, toB、having, fromC、to have, fromD、have been to
问答题Practice 4 I am writing to confirm our telephone conversation of Thursday, the 7th, about our visit to your company. Next Monday, December 11, will be fine for us and we hope that it will suit you, too. My secretary, Miss Mary Brown, and Sales Manager, Mr. Zhang Ming, will be coming in the morning. It’s unfortunate that l will not be able to go with them. Thanks again for giving us this opportunity to visit with you.
单选题We confirm（）your order No.7891 dated May 10，1990.Ato have receivedBhaving receivedCreceivingDtoreceive