Dogownersnowhavealittlehelpund-优题课

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 wereB. 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–inB. shows where researchers got their new ideas
C. states the author’s opinion D. describes the result of researchers’ studies

China news, Beijing, Feb. 9 --- Housing price in China has always aroused heated discussions among property developers and ordinary Chinese. To many property developers and local government officials, housing price in China is still low compared with many developed countries. However, the average housing price in the United States is only 8,000 yuan per square meter, while in China, it is even higher than in the United States. This shows that there are some bubbles(泡沫) in Chinese real estate market, the International Finance News reported.
Although the average price of residential houses in the United States, after converted to Renminbi, is about 8,000 yuan per square meter, the houses in US are not sold in terms of building area, as most Chinese property developers do when they sell their houses. If US property developers sell their houses according to the building area, then the housing price will be even lower than 8,000 yuan per square meter. In most big Chinese cities, such as Beijing, Shanghai, and Shenzhen, houses are sold at a price even higher than those in the US.
The high housing sales price in large cities in China proves that Chinese real estate market does have some bubbles. Moreover, Chinese houses can not be compared with houses in US in terms of building quality, environment and supporting facilities. Furthermore, it should be noted that American people's average income is several dozen times higher than that of Chinese people. How can the Chinese afford to buy a house which is even more expensive than that sold in US?
At the beginning of 2007, Chinese government issued a set of policies that aimed to benefit the public. Now in order to reduce the high housing prices, the government can regulate the real estate market by raising tax on property industry and controlling the release of loans and lands to property developers. At the same time, the government should allow people to build more houses through various fund-raising channels, such as funds collected from buyers or raised by working units. By applying these multiple means, it is expected that the high housing prices can be lowered.
36．According to the passage, what is the average housing price per square meter in China?
A．8000 yuan B．10000 yuan C．7000 yuanD．It's not mentioned here
37．Which of the following does NOT support the idea that the average housing price in China is even higher than in the United States?
A．Chinese houses can not be compared with houses in US in terms of building quality,
environment and supporting facilities.
B．American people's average income is several dozen times higher than that of Chinese
people.
C．The houses in US are not sold in terms of building area, as most Chinese property
developers do when they sell their houses.
D．There are more people who need houses in China.
38．What is the main idea of this passage?
A．The housing price in China is so high that the government should do something
useful to prevent it.
B．There are some bubbles in Chinese real estate market.
C．The average housing price in China is even higher than in the United States.
D．Chinese government issued a set of policies that aimed to benefit the public.
39．How many measures are mentioned in the last paragraph in order to reduce the high
housing prices?
A．Four B．Three C．Five D．Two

My topic is fashion(时装). Fashion is important to all of us. Now we are all wearing school uniforms(校服). When we go home, what do we do? We change into other clothes. If we are going out, we like to wear fashionable clothes. So my first object is this blouse. It looks beautiful, doesn’t it? It is the most expensive piece of clothing, and I love it. It cost over ＄600. You may say that it is too expensive, but luckily I can afford it. The more you spend, the better the quality is. So you see, fashion is quite important to me, I admire it.
However, I’m not as fond of fashion as my elder brother. Last summer, my parents took us both to London. They wanted to show us some famous sights. But my brother Gary did not appreciate the old buildings. He just wanted to spend all his time in the big shopping arcades(拱廊), searching for the coolest pair of trousers! For him, fashion was more important than culture. These are the trousers he bought. Were they worth the expensive of a trip to London to buy these? I don’t think so. I think it was a waste of time and money.
We must, however, remember that fashion is a very big business. Changes in fashion can create or lose jobs. As an example, I have bought this blonde(淡黄色的) wig(假发) to show you. Do you like it? It belongs to one of my mother’s friends. She told me that in the 1960s, it was fashionable for western women to wear wigs. But a few years later fashions changed and women wore wigs much less often. Then the wig factories closed down and hundreds of workers lost their jobs.
53. The passage may be ____.
A. a story from a magazine B. a piece of news from a newspaper
C. a report on the radio D. a speech to the classmates
54. The author （作者）showed all these objects EXCEPT_____ in the passage.
A. the blonde wig B. the expensive blouse
C. the coolest trousers D. the school uniform
55. What does the author （作者）want to tell us in last paragraph?
A. Wigs were always popular
B. People in the east once liked wearing blonde wigs
C. Fashion is actually a business
D. Business often depends on the production of wigs.

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49. The one who puts on the first advertisement probably wants to ______.
A. rent a beautiful flat of her own in Happy Valley
B. find another lady to share the cost to rent a flat
C. share her room in a flat with whoever has no pet
D. find a maid to look after herself
50. According to the advertisements, you may _______.
A. buy an old picture for $150
B. call 25720836 to see a beautiful lake
C. buy two armchairs for $400
D. hire a maid （女佣）by paying $6,800
51. If you want to buy some old furniture, you should ______.
A. get in touch with NOVA ELECTRONICS
B. call 2524-5867 any day except Monday
C. do it before you move to another place
D. call either 2524-5867 on Monday or 2521-6011 on Saturday
52. Once you get a part-time job in NOVA ELECTRONICS, _______.
A. you will be given 14 days off each year besides weekends
B. you will get $6,598 each month no matter how experienced you are
C. your have to work at least 8 hours a day
D. you should write a letter of application to Mrs G Chan

People in the United States honor their parents with two special days: Mother’s Day, on the second Sunday in May, and Father’s Day, on the third Sunday in June. These days are set aside to show love and respect for parents. They raise their children and educate them to be responsible citizens. They give love and care. These two days offer a chance to think about the changing roles of mothers and fathers. More mothers now work outside the home. More fathers must help with child-care.
These two special days are celebrated in many different ways. On Mother’s Day people wear carnations. A red one stands for a living mother. A white one shows that the mother is dead. Many people attend religious services(宗教仪式) to honor parents. It is also a day when people whose parents are dead visit their graves(墓). On these days, families get together at home and in restaurants. These are days of fun and good feelings and memories.
Another tradition is to give cards and gifts. Children make them in school. Many people make their own presents. These are valued more than the ones bought in stores. It is not the value of the gift that is important, but it is “the thought that counts”. Greeting card stores, florists, candy makers, bakeries（面包房）, telephones companies and other stores do a lot of business during these holidays.
45.Which is NOT a reason for children to show love and respect for parents?
A Parents bring up children
B Parents give love and care to children
C Parents educate children to be good persons.
D Parents pass away before children grow up
46.What do you know from the passage?
A Mother’s Day and Father’s Day are both in May.
B Fewer women worked outside the home in the past
C Not all the children respect their parents
D Fathers are not as important as mothers at home
47.Which do you think is right about “carnation”?
A It only has two kinds of color.
B It is a special kind of clothes people wear on Mother’s Day or Father’s Day.
C It’s a kind of flower showing love and best wishes.
D People can wear carnations only on the third Sunday in June.
48.What do you think “florists” do?
A They sell flowers B They made bread or pastry
C They offer enough room for having family parties.
D They sell special candy for Mother’s Day and Father’s Day.

A．Bow-Lingual’s inventors	B．dog barks and their different emotions
C．talking dogs	D．a little help for dog owners