题目内容

23. ---________the new housemaid cook some supper for you, Tom?

---No, tell her I’ll eat outside tonight.

     A. Shall             B. Would       C. Will  D．Could

A

练习册系列答案
相关题目


B
When people lose legs after accidents or illnesses, emergency care and artificial limbs（假肢）often allow them to walk again. Newts （蝾螈） in the same situation, on the other hand, can grow limbs back on their own! Scientists have known for a long time that certain animals can re-grow limbs, but they haven’t quite figured out how these creatures do it.
Researchers have now come up with some new ideas. Their work may give people the ability to re-grow lost limbs. The researchers started with two simple experiments：when you cut a newt’s leg at the ankle, only the foot grows back；when you cut off a leg at the very end, the whole leg grows back. In both cases, the re-growth begins with stem cells. Stem cells can develop into nearly any type of cell in the body.
How do a newt’s stem cells know when to grow only a foot and when to re-grow a whole leg?
This question relates to another mystery. In newt’s, a cut-off leg will grow back only if the nerve bundle（神经束）in it also grows back , but if something prevents the nerve bundle from growing, the stem cells at the wound won’t re-grow a new leg.
In its study, a British team focused on a protein called n-AG. When the team prevented nerves in a limb from growing, but added the n-AG protein to stem cells in the limb, the limb still re-grew. That protein seems to guide limb re-growth. People have proteins that are similar to n-AG. Further research into these materials may someday help human limbs recover by themselves.
40. In the experiments, the researchers cut off a newt’s foot or leg to find out _____.
A. what stem cells were                     B. whether they would grow back
C. how long it would take to re-grow    D. how they would re-grow
41. A newt will re-grow its leg if _____.
A. its ankle was cut off but the nerve bundle was good
B. its leg was cut off and the nerve bundle stopped growing
C. its leg was cut off and the nerve bundle could grow back
D. its ankle and the nerve bundle were cut off
42. What do the underlined words “these materials” refer to?
A. Nerve bundles and proteins.         B. Proteins similar to n-AG.
C. Stem cells and proteins.               D. Stem cells and nerve bundles.
43. The first sentence of the passage _____.
A. acts as a lead–in                       B. shows where researchers got their new ideas
C. states the author’s opinion           D. describes the result of researchers’ studies

阅读下面短文，根据以下提示：1)汉语提示；2)首字母提示；3)语境提示，在每个空格内填入一个适当的英语单词，并将该词完整地写在右边相对应的横线上。所填单词要求意义准确、拼写正确。
A lot of hiking holidays sound e_____________, 【小题1】___________
but the r___________(现实)is often very different. 【小题2】__________
Hiking trips can be _________(不舒适的)and even 【小题3】___________
dangerous.However,at A________2000 we feel that we 【小题4】__________
understand the n______of hikers.All our guides have【小题5】___________
several years of __________(经验) in      【小题6】__________
__________(带领)hiking trips in the Himalayas.  【小题7】___________
They know all the best_________(路线)and the best  【小题8】___________
places to camp.We also realize that hiking can be hard
work and believe that hikers need our help.As well as
the group guide,all teams have cooks and porters.While
on the hiking trip,our cooks prepare__________(可口的) 【小题9】___________
meals.And our porters carry your_________(行李),which【小题10】___________
means that you can simply enjoy the hiking action.

单词（共20小题；每题0.5分，满分10分）

1.The children are doing well a____________ (学业上).

2.Her abilities are not fully a____________ (欣赏) by her employer.

3.They brought back a few s____________ (纪念品) from their holiday in Greece.

4.Her husband’s death left a v____________ (真空) in her life.

5.Kids e____________ (精疲力竭) themselves by running wildly around the park.

6.Crowds poured into the Beijing Worker’s S____________ (体育场) to watch the performance.

7.She knew she hadn’t done enough r____________ (复习) for tomorrow’s exam.

8. With winter a____________ (临近), many animals are storing food.

9. I didn’t want to ask her a lot of e____________ (尴尬的) questions in front of her friends.

10.The singer got an e____________ (热情的) reception at the airport.

11.She’s a very i____________ (印象深刻的) public speaker.

12. “Artificial I____________ (智能)” is a famous science fiction directed by Steven Spielberg.

13. Many modern arts are being displayed in that art g____________ (美术馆).

14. A lot of small companies have to fight for s____________ (生存).

15.The captain gave the order to a____________ (遗弃) the ship since it was sinking fast.

16.The hotel room had a g__________ (美丽的) view over the lake.

17.He first went to France as an e__________ (交换) student from Beijing.

18.The baby was f_________ (害怕) of being left by itself in the house.

19. In general, the bride’s father gave her away at the wedding c____________ (仪式).

20. Is there a good restaurant in the n____________ (周围)?

 

 

1.Tom was d ______ to learn that he had passed the important lest．

2.Whether we will go for an outing or not tomorrow d ______ on the weather．

3.Mike tried again and again and e _____ he made it．

4.Have you ever heard of the n ______ who wrote the great novel David Copperfield?

5.Because of the f______,roads and houses were washed away and people became homeless．

6.Anyone who has done something ______ （非法的） will be punished．

7.All the representatives ______ （交换） their opinions before the conclusion was reached．

8.It is reported that a lot of presidents will be present at the opening ______ （仪式）．

9.It is necessary to learn to ______ （预测） what the passage is all about．

10.Please lake good care of the ______ （设备） when you are doing experiments in the lab．

 

When people lose legs after accidents or illnesses, emergency care and artificial limbs（假肢）often allow them to walk again. Newts （蝾螈） in the same situation, on the other hand, can grow limbs back on their own! Scientists have known for a long time that certain animals can re-grow limbs, but they haven’t quite figured out how these creatures do it.

Researchers have now come up with some new ideas. Their work may give people the ability to re-grow lost limbs. The researchers started with two simple experiments：when you cut a newt’s leg at the ankle, only the foot grows back；when you cut off a leg at the very end, the whole leg grows back. In both cases, the re-growth begins with stem cells. Stem cells can develop into nearly any type of cell in the body.

How do a newt’s stem cells know when to grow only a foot and when to re-grow a whole leg?

This question relates to another mystery. In newt’s, a cut-off leg will grow back only if the nerve bundle（神经束）in it also grows back , but if something prevents the nerve bundle from growing, the stem cells at the wound won’t re-grow a new leg.

In its study, a British team focused on a protein called n-AG. When the team prevented nerves in a limb from growing, but added the n-AG protein to stem cells in the limb, the limb still re-grew. That protein seems to guide limb re-growth. People have proteins that are similar to n-AG. Further research into these materials may someday help human limbs recover by themselves.

40. In the experiments, the researchers cut off a newt’s foot or leg to find out _____.

A. what stem cells were                    B. whether they would grow back

C. how long it would take to re-grow    D. how they would re-grow

41. A newt will re-grow its leg if _____.

A. its ankle was cut off but the nerve bundle was good

B. its leg was cut off and the nerve bundle stopped growing

C. its leg was cut off and the nerve bundle could grow back

D. its ankle and the nerve bundle were cut off

42. What do the underlined words “these materials” refer to?

A. Nerve bundles and proteins.         B. Proteins similar to n-AG.

C. Stem cells and proteins.              D. Stem cells and nerve bundles.

43. The first sentence of the passage _____.

A. acts as a lead–in                      B. shows where researchers got their new ideas

C. states the author’s opinion           D. describes the result of researchers’ studies

 

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网