题目内容
Man cannot go on (1) his numbers at the present rate, In the (2) 30 years man will face a period of crisis. (3) experts believe that there will be a widespread food (4) . Other experts think this is (5) pessimistic, and that man can prevent things (6) worse than they are now. But (7) that two-thirds of the people in the world are undernourished or starving now.One thing that man can do is to limit (8) of babies born. The need (9) this is obvious, but it is (10) to achieve. People have to (11) _ to limit their families. In the countries of the population (12) , many people like big families. The parents think that this (13) a bigger income for the family and ensures there will be someone in the family who will look (14) them in old age.Several governments have (15) birth control policies in recent years. (16) them are Japan, China, India and Egypt. In some (17) the results have not been (18) . Japan has been an exception. The Japanese adopted a birth control policy in 1948. People (19) to limit their families. The birth rate fell from 34. 3 per thousand per year to about 17. 0 per year (20) . 13（）
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Human cloning technology could be used to reverse heart attacks. Scientists believe that they may be able to treat heart attack victims by cloning their healthy heart cells and injecting them into the areas of the heart that have been damaged, and other problems may be solved if human cloning and its technology are not forbidden. With cloning, infertile couples could have children. Current treatments for infertility, in terms of percentages, are not very successfully. Couples go through physically and emotionally painful procedures for a small chance of having children. Many couples run out of time and money without successfully having children. Human cloning could make it possible for many more infertile couples to have children than ever before. We should be able to clone the bone marrow for children and adults suffering from leukemia．This is expected to be one of the first benefits to come from cloning technology. We may learn how to switch cells on and off through cloning and thus be able to cure cancer. Cloning technology can be used to test for and perhaps cure gene-related diseases. The above is just a few examples of what human cloning technology can do for mankind．This new technology promises unprecedented advancement in medicine if people will release their fears and let the benefits begin. According to the passage, one of the first expected benefits from cloning technology may be in ______.
testify to rehearsal demolish elusive evoke capital in search for disillusioned exotic legitimate strike implant novelty embark on in bulk nebulous pseudonym Early colonists in North America usually______ Puritan ideas in their children.
采用顶推法施工时，桥梁顶推就位后需要拆除临时预应力束，临时预应力张拉后不应灌浆，锚具外露多余预应力钢材不必切除。（）
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