A. on B. in C. by D. with (6) Scientists in the United States are using teat-tube baby techniques to try to save wild animals 1 extinction. The test-tube technique, or in-vitro fertilization, 2 involves fertilizing eggsin the laboratory and then 3 them inside the female, became famous when human babies were conceivedin this way. The technique is now helping another mammal---the tiger. 4 the process is successful, it could prevent many species dying 5 . At Minnesota Zoo, in the US, scientists have taken semen from a male tiger and eggs from a female tiger, and 6 them together in the 7 . These men fertilizes the eggs and, after a period of about 36 hours, the new embryoscan be implanted in the uterusof a tigress. This technique 8 the baby tiger to develop naturally 9 the uterus. A big 10 of this method is that the female tiger does not even have to be the same 11 as the embryo. The zoo team found 12 could use a Siberian tiger as a surrogate motherfor Bengali tiger embryos. The test-tube tiger technique could 13 in a bank of embryos of 14 animals. An embryo store would help 15 a healthy genetic mixture within 16 groups of animals. Many species today are threatened by hunting, or by the 17 of their habitatand food chains. Threatened animals are often 18 in numbers and left in isolated groups. Away from other herds or family groups of their own kind, they are 59 to breed with close relativesand this produces many more unhealthy off-spring than 20 normally occur. 查看更多

 

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  In 1954 a turning point in medical history, resulting from applied bionics (仿生学), was the first“open heart”surgery done in Minneapolis, Minnesoda, by Dr.C.W Lillehei.Dr.Lillehei’s techniques for the first time allowed the patient to be operated upon while blood was supplied to the patient from a donor.Today“open heart”surgery, using more advanced methods and bionic devices, is common in the United States.

  The technological advances such as those already mentioned have encouraged scientists to develop the artificial(man-made)heart.Early in 1983, in its first use by a human patient, a medical team at the University of Utah Medical Center replaced the diseased heart of Dr.Clark with a mechanical pump.Clark was sixty-one years old when his diseased heart was replaced by a Jarvik-7.

  The world watched amazed as television pictures of Dr.Clark showed him as he improved steadily after the surgery.His continued life showed that a bionic device could imitate the action and function of a healthy heart.Dr.Clark lived for 112 days.

  Life-like or bionic machines have existed for centuries.The development of tools by man’s ancestors is a good example of the application of bionics to extend human capabilities.Modern bionic research is especially involved in prosthetics (修复术)--- devices that replace diseased body parts such as arms, legs, and eyes.

  The future for applied bionics appears to be promising.Existing bionic devices will become smaller, faster, and more effective.The artificial heart used for Dr.Chark is only one of experimental replacement devices.It is likely to be joined in the future by replacements for other internal systems or organs.Bionic livers, stomachs, and lungs are not impossibilities!

(1)

Which of the following does the passage mainly discuss?

[  ]

A.

first developed applied bionics

B.

The first “open heart” surgery.

C.

The development of the artificial heart.

D.

The future of applied bionics.

(2)

According to the passage, it was Dr.C.W.Lillehei that ________.

[  ]

A.

first developed applied bionics

B.

developed the artificial heart

C.

was the first to operate on the heart of a patient

D.

used more advanced methods to do “open heart” surgery

(3)

By“Dr.Clark lived for 112 days ,”the author most probably means that ________.

[  ]

A.

the replacement of Dr.Clark’s heart was a failure

B.

there was still a long way to go in applied bionics

C.

applied bionics was promising

D.

the first artificial heart was most effective

(4)

The author’s attitude towards applied bionics is ________.

[  ]

A.

critical

B.

approving

C.

objective

D.

doubting

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I would like to suggest that for sixty to ninety minutes each evening all television broadcasting in the United States be forbidden by law. Let us take a      , reasonable look at what the results might be if such a(an)      were accepted.

Families might use the time for a real family hour. Without the distraction(分散注意力) of TV, they might     together after dinner and actually talk to one another. It is well known that many of our    ----everything in fact, from the generation gap to the high divorce rate to some forms of     illness ----are caused at least in part by     to communicate. By using the quiet family hour to     our problems, we might get to know each other better, and to like each other better. On evenings when such talk is     , families could discover more active pastimes(娱乐). Freed from TV and forced to find their own activities, they might take a     together to watch the sunset     they might take a walk together.

      free time and no TV, children and adults might discover reading. There is more entertainment in       than in a TV program.       report that the generation growing up with television can hardly write an English sentence,       at the college level.     is often learned from reading. A more literate new generation could be a product of the quiet hour. A different form of reading might also be done     it was in the past: reading aloud. The quiet hour could become the story hour. When the     ends, the TV networks might be forced to     with better shows in order to get us back from our newly- discovered activities.

At first glance, this idea seems radical(激进的).     will we spend the time then? The fact is: it has been only twenty-five years since television came to control American free time. Those of us thirty-five and older can     childhoods without television. It wasn't that difficult.

1.A. valuable              B. pleasant                  C. serious           D. quick

2.A. suggestion          B. advice            C. opinion          D. offer

3.A. get around                   B. sit around               C. meet with               D. stand stiff

4.A. misfortunes                 B. troubles                  C. affairs             D. problems

5.A. physical               B. mental           C. common                 D. familiar

6.A. failure                  B. attempt                   C. ability             D. permission

7.A. comment            B. talk                 C. discuss           D. remark

8.A. impossible          B. unpleasant             C. funny             D. unnecessary

9.A. ride             B. look                C. walk                D. rest

10.A. And          B. But                  C. Or                   D. While

11.A. At              B. With               C. For                  D. In

12.A. a good book     B. a fine poem            C. a quiet hour                   D. a composition

13.A. Professors                 B. Scientists                C. Educators               D. Parents

14.A. yet            B. still                  C. just                 D. even

15.A. Skill           B. Writing          C. Speaking                 D. Listening

16.A. before               B. as           C. after               D. when

17.A. talk           B. programme            C. performance                   D. quiet-hour

18.A. come across              B. come about            C. come out                D. come up

19.A. How                   B. Whether                 C. What              D. If

20.A. remind              B. recognize               C. remember    D. know

 

查看答案和解析>>

I would like to suggest that for sixty to ninety minutes each evening all television broadcasting in the United States be forbidden by law.

Let us take a __1___, reasonable look at what the results might be if such a(n) _2___were accepted: Families might use the time for a real family hour. Without the distraction of TV, they might _3__ together after dinner and actually talk to one another. It is well known that many of our _4__in everything in fact, from the generation gap to the high divorce rate to some forms of __5__ illness are caused at least in part by _6___ to communicate. By using the quiet family hour to__7_ our problems, we might get to know each other better, and to like each other better.

On evenings when such a talk is _8__, families could discover more active pastimes(消遣). Freed from TV, forced to find their own activities, they might take a _9__ together to watch the sunset _10___ they might take a walk together. _11___free time and no TV, children and adults might discover reading. There is more entertainment in _12___ than in a TV program. _13___ report that the generation growing up with television can hardly write an English sentence, ___14___ at the college level. __15__is often learned from reading. A more literate new generation could be a product of the quite hour.

A different _16__ of reading might also be done as it was in the past: reading aloud. The quiet hour could become the story hour. When the quiet hour _17___, the TV net works might be forced to __18__ with better shows in order to get us back from our newly discovered activities.

At first glance, this idea seems radical(极端的). How will we spend the time then? The fact is: it has been only twenty-five years _19___television came to control American free time. Those of us thirty-five and older can __20__childhoods without television. It wasn’t that difficult.

1. A. valuable    B. pleasant    C. quick   D. serious

2. A. advice     B. suggestion  C. opinion   D. offer

3. A. get around   B. stand still   C. meet    D. sit around

4. A. problems    B. trouble    C. affairs   D. misfortune

5. A. physical   B. common    C. mental    D. familiar

6. A. attempt   B. failure    C. ability     D. permission

7. A. discuss   B. talk      C. make sure   D. see to

8. A. acceptable  B. unnecessary  C. funny    D. unpleasant

9. A. walk     B. look     C. ride     D. rest

10. A. and     B. or      C. but     D. while

11. A. At      B. In      C. For     D. With

12. A. a fine poem  B. a good book  C. a quiet hour  D. a composition

13. A. Professor   B. Scientists   C. Parents    D. Education

14. A. yet      B. still      C. even     D. just

15. A. Writing    B. Thinking   C. Speaking   D. Listening

16. A. Form     B. kind     C. method    D. step

17. A. starts     B. ends     C. comes     D. lasts

18. A. come across   B. come about  C. come up   D. broadcast

19. A. before     B. since     C. until     D. after

20. A. remind     B. remember   C. recognize   D. know

 

查看答案和解析>>

I would like to suggest that for sixty to ninety minutes each evening all television broadcasting in the United States be forbidden by law.

Let us take a __1__ , reasonable look at what the results might be if such a(n) __2__ were accepted. Families might use the time for a real family hour. Without the distraction of TV, they might __3__ together after dinner and actually talk to one another. It is well known that many of our __4__ -everything in fact, from the generation gap to the high divorce rate to some forms of __5__illness-are caused at least in part by __6__ to communicate. By using the quiet family hour to __7__our problems, we might get to know each other better, and to like each other better.

On evenings when such talk is __8__ , families could discover more active pastimes(消遣;娱乐). Freed from TV, forced to find their own activities, they might take a __9__together to watch the sunset __10__ they might take a walk together. __11__free time and no TV, children and adults might discover reading. There is more entertainment in __12__ than in a TV program. __13__ report that the generation growing up with television can hardly write an English sentence, __14__ at the college level. __15__ is often learned from reading. A more literate new generation could be a product of the quiet hour.

A different __16__ of reading might also be done as it was in the past: reading aloud. The quiet hour could become the story hour. When the __17__ ends, the TV net works might be forced to __18__with better shows in order to get us back from our newly-discovered activities.

At first glance, this idea seems radical(激进的). How will we spend the time then? The fact is: it has been only twenty-five years __19__ television came to control American free time. Those of us thirty-five and older can __20__ childhoods without television. It wasn't that difficult.

1. A. valuable B. pleasant C. quick D. serious

2. A. thing B. suggestion C. opinion D. offer

3. A. get around B. stand still C. meet D. sit around

4. A. problems B. trouble C. affairs D. misfortune

5. A. physical B. common C. mental D. familiar

6. A. attempt B. failure C. ability D. permission

7. A. discuss B. tell C. make sure D. see to

8. A. possible B. unnecessary C. funny D. unpleasant

9. A. walk B. look C. ride D. rest

10. A. and B. or C. but D. while

11. A. At B. In C. For D. With

12. A. a fine poem B. a good book C. a quiet hour D. a composition

13. A. Doctors B. Scientists C. Parents D. Educators

14. A. yet B. still C. even D. just

15. A. Writing B. Skill C. Speaking D. Listening

16. A. form B. kind C. method D. step

17. A. reading B. quiet hour C. activity D. programme

18. A. come across B. come about C. come up D. broadcast

19. A. before B. since C. until D. after

20. A. remind B. remember C. recognize D. know

查看答案和解析>>

I would like to suggest that for sixty to ninety minutes each evening all television broadcasting in the United States be forbidden by law.

Let us take a 21 ,reasonable look at what the results might be if such a(an)  22 were accepted; families might use the time for a real family hour.Without the distraction(分散注意力) of TV, they might 23 to gether after dinner and actually talk to one another.It is well known that many of our 24 —everything in fact, from me generation gap to the high divorce rate to some forms of 25 illness —are caused at least in part by 26 to communicate.By using the quiet family hour to 27 our problems, we might get to know each other better, and to like each other better.

On evenings when such talk is 28 , families could discover more active pastimes(娱乐).Freed from TV and forced to find their own activities, they might take a 29 tog ether to watch the sunset.30 they might take a walk together. 31 free time and no TV, children and adults might discover reading.There is more entertainment in 32 than in a TV program. 33 rep ort that the generation growing up with television can hardly write an English sentence, 34 at the college level. 35 is often learned from reading.A more literate new generation could be a product of the quiet hour.

A different form of reading might also be done 36 it was in the past: reading aloud.The quiet hour could become the story hour.When the 37 ends, the TV networks might be forced to 38 with better shows i n order to get us back from our newly- discovered activities.

At first glance, this idea seems radical (激进的) .39 will we spend the time then? The fact is: it has been only twenty-five years since television came to control American free time. Those of us thirty-five and older can 40 childhoods without television.It wasn't that difficult.

21.A.valuable        B.pleasant        C.quick         D.serious

22.A.advice         B.suggestion      C.opinion        D.offer

23.A.get around      B.stand stiff      C.meet with      D.sit around

24.A.problems       B.troubles        C.affairs         D.misfortunes

25.A.physical       B.common       C.mental         D.familiar

26.A.attempt        B.failure         C.ability         D.permission

27.A.discuss        B.talk           C.comment       D.remark

28.A.impossible      B.unnecessary     C.funny         D.unpleasant

29.A.walk          B.look          C.ride           D.rest

30.A.And          B.Or           C.But           D.While

31.A.At            B.In            C.For           D.With

32.A.a fine poem     B.a good book     C.a quiet hour     D.a composition

33.A.Professors      B.Scientists       C.Parents        D.Educators

34.A.yet           B.still           C.even          D.just

35.A.Writing        B.Skill          C.Speaking       D.Listening

36.A.as            B.before         C.after          D.when

37.A.reading        B.quiet-hour      C.activity        D.programme

38.A.come across    B.come about     C.come up       D.come out

39.A.Whether       B.How          C.What         D.If

40.A.remind        B.remember      C.recognize      D.know

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