问答题Helen is twenty years old, and her age is four times as much as Mary’s. When Helen’s age is twice as much as Mary’s, how old is Helen then?
问答题
Helen is twenty years old, and her age is four times as much as Mary’s. When Helen’s age is twice as much as Mary’s, how old is Helen then?
参考解析
解析：
海伦20岁了，他的年龄是玛丽年龄的4陪，由此可知玛丽的年龄是5岁。设ⅹ年后海伦的年龄是玛丽年龄的2倍，则20+ⅹ=2（5+ⅹ），得ⅹ=10。十年后玛丽的年龄为30岁。
海伦20岁了，他的年龄是玛丽年龄的4陪，由此可知玛丽的年龄是5岁。设ⅹ年后海伦的年龄是玛丽年龄的2倍，则20+ⅹ=2（5+ⅹ），得ⅹ=10。十年后玛丽的年龄为30岁。
相关考题：
My uncle has been taught in this school _______ he was twenty years old.A. since B. for C. until D. after
Climate will warm up over the next 50 to 100 years () it has warmed in the 20,000 years since Ice Age. A、as long asB、as soon asC、as well asD、as much as
28． How old is John's brother now when John is fifteen in the story?A．Ten years old．B． Fifteen years oldC． Twenty years oldD． Twenty-five years old．
Medicine DirectionsTake two tablets with warm water, followed by one tablet every eight hours, as required. For maximum nighttime and early morning relief, take two tablets at bedtime. Do not exceed six tablets in twenty-four hours.For children six to twelve years old, give half the adult dosage. For children under six years old consult your doctor.Reduce dosage if nervousness, restlessness, or sleeplessness occurs.The label on this medicine bottle clearly warns not to take more than ______.A．twenty-four tablets a dayB．eight tablets a dayC．six tablets a dayD．three tablets a day
She has stored ______books as I.A. three times as manyB. three times as muchC. four time as manyD. three time as much
Although she has not appeared in a movie for over twenty years, her name is still familiar to her fans, old and young _______.A. togetherB. alikeC. likeD. all
It can be inferred that before the little girl finally went out to enjoy the first snow of winter，the teacher had to help her put on her boots .A. once B. twice C. three times D. four times
No one can expect to fully enjoy the adulthood privileges until he is ________.[A] eleven years old[B] sixteen years old[C] twenty-one years old[D] between twelve and twenty-one years old
This bridge is ______ that one.A. four times as long ofB. as four times asC. four times as long asD. long four times of
Passage FiveHelen Keller was born a healthy normal child in Alabama in 1880. However, an illness with a high fever struck her when she was still a child. She became deaf, blind, and unable to speak. For little Helen, the world was suddenly a dark and frightening place. She was wild and stubborn. everal years later a miracle came into Helen's life when Anne Sullivan, a strong and loving person, became Helen's teacher. Miss Sullivan's teaching changed the child into a responsible human being. Through her help Helen Keller learned to communicate with those around her, and as she grew older, others benefited from her unique insights and courage. Miss Keller died in 1968, but her spirit lives on. It lives on in her articles and books and in the stories of people who were fortunate enough to meet her during her lifetime.51. Why was Helen Keller blind, deaf and unable to speak?A. Because she'd been born that way.B. Because a horse had kicked her.C. Because she'd had a very high fever.D. Because she'd had a bad fall.
The working parent is not willing to listen to her (his) four-year-old child talking about hissandbox games because she (he) is___________.A.boringB.very tiredC.busyD.angry
共用题干Helen and MartinWith a thoughtful sigh,Helen turned away from the window and walked back to her favourite armchair.______(1) her brother never arrive?For a brief moment,she wondered if she really cared that much.Over the years Helen had given______(2) waiting for Martin to take an interest in her.Her feelings for him had gradually______(3) until now,as she sat waiting for him,she experienced no more than a sister's ______(4) to see what had ______(5) of her brother.Almost without______(6) ,Martin had lost his job with a busy publishing company after spending the last eight years in New York as a key figure in the US office.Somehow the two of them hadn't______(7) to keep in touch and,left alone,Helen had slowly found her______(8) in her own judgment growing.______(9) the wishes of her parents,she had left university halfway______(10) her course and now,to the astonishment of the whole family,she was______(11) a fast-growing reputation in the pages of respected art magazines and was actually earning enough to live______(12) from her paintings.Of course,she______(13) no pleasure in Martin's sudden misfortune,but she couldn't______(14) looking forward to her brother's arrival with______(15) satisfaction at what she had achieved.8._________A:dependenceB:confidenceC:certaintyD:courage
Our factory is much more productive now. This year’s production is five times as much （） it was ten years ago.AwhatBasCthatDthan
单选题She is an excellent teacher who has taught in four schools. _____ she taught, her principals had a high opinion of her.AWhereverBEverywhereCIn as much asDIn such schools that
问答题Four years ago, Jane was twice as old as Sam. Four years on from now, Sam will be 3/4 of Jane's age. How old is Jane now?
问答题When David is twice as old as he is now he will be four times as old as his daughter Jane will be in five years time. If in 1990, four years ago, he was four times as old as his daughter, in what year was she born?
单选题Seven years ago, Scott was 3 times as old as Kathy was at that time. If Scott is now 5 years older than Kathy, how old is Scott ?A12.5B13C14D14.5
单选题According to the information given in the passage, if two20-year-old twins lived on earth, and one of them left on a journey for Alpha Centauri at very close to the speed of light, then managed to survive the journey and return to earth having aged 40 years during the journey, what could she expect to find upon her return to earth?AHer great-grandmotherBHer twin at the age of 20CHer twin at the age of 40DHer twin at the age of 60EHer twin’s great-grandchildren
单选题Helen was much kinder to her youngest child than she was to the others, ______ ,of course, made the others jealous.AwhomBthatCwhatDwhich
单选题Mary's daughter, although only six years old, showed ingenuity in making a dress for her doll.AthoughtfulnessBcleverness Csincerity Dtruthfulness
单选题According to the passage, which of the following is TRUE?AFreedman and his colleagues hired 400,000 Americans to collect data.BAbout four hundred thousand Americans worked for Freedman's team full time for 13 years.CPeople who took part in Freedman's research are about 50 to 70 years old.DPeople who are 50 to 70 years old seldom drink coffee
单选题Our factory is much more productive now. This year’s production is five times as much （） it was ten years ago.AwhatBasCthatDthan
单选题She is an excellent teacher who has taught in four schools. ______ she taught, her principals had a high opinion of her.AWherever BEverywhereCIn as much asDIn such schools that
单选题No particular stage of life is less happy than another, not the tumultuous teenage years or the mid-life period, not _____ the waning decades of old age.AactuallyBalsoConlyDeven
单选题He looks old for his age. I think he must have _____ a lot in those years.Agone overBgone byCgone throughDgone with
问答题By the time the youngest was fifteen, the mother would have been in her early fifties and would expect to live a further twenty years, during which chance and health made it unusual for her to get paid work.