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政府为了扶植农业,对农产品实行支持价格,但政府为了维持这个高于均衡价格的支持价格,就必须______。

A. 试行农产品配给制
B. 收购过剩的农产品
C. 增加对农产品的税收
D. 给农民补贴

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The use of nuclear power has already spread all over the world. (1)_____, scientists still have not agreed with what should be done with the large (2)_____ of waste materials that (3)_____ to increase every year. Most waste materials (4)_____ of simply by placing them somewhere. But nuclear waste must be (5)_____ with great care. It (6)_____ dangerous radiation and it will continue to be (7)_____ for hundreds of thousands, even millions of years. How should we get (8)_____ of such waste material in such a way (9)_____ it will not harm the (10)_____ Where can we (11)_____ distribute it One idea is to put this radioactive waste inside a thick container, which is (12)_____ dropped to the deep bottom of the ocean. (13)_____ some scientists believe that this way of (14)_____ nuclear waste could kill fish and other living things in the oceans or interfere (15)_____ their growth. Another way to (16)_____ nuclear waste is to send it into space, to the sun, (17)_____ it would be burned. Other scientists suggest that this polluting material be (18)_____ thousands of meters under the earth"s surface. Such underground areas must be free (19)_____ possible earthquakes, and advances are being made. But it may still be many years (20)_____ this problem could be finally settled.

A. until
B. after
C. before
D. unless

生产价格的构成是生产成本加上______。

A. 剩余价值
B. 利润
C. 平均利润
D. 超额利润

The use of nuclear power has already spread all over the world. (1)_____, scientists still have not agreed with what should be done with the large (2)_____ of waste materials that (3)_____ to increase every year. Most waste materials (4)_____ of simply by placing them somewhere. But nuclear waste must be (5)_____ with great care. It (6)_____ dangerous radiation and it will continue to be (7)_____ for hundreds of thousands, even millions of years. How should we get (8)_____ of such waste material in such a way (9)_____ it will not harm the (10)_____ Where can we (11)_____ distribute it One idea is to put this radioactive waste inside a thick container, which is (12)_____ dropped to the deep bottom of the ocean. (13)_____ some scientists believe that this way of (14)_____ nuclear waste could kill fish and other living things in the oceans or interfere (15)_____ their growth. Another way to (16)_____ nuclear waste is to send it into space, to the sun, (17)_____ it would be burned. Other scientists suggest that this polluting material be (18)_____ thousands of meters under the earth"s surface. Such underground areas must be free (19)_____ possible earthquakes, and advances are being made. But it may still be many years (20)_____ this problem could be finally settled.

A. covered
B. deposited
C. buried
D. reserved

Title: HOW TO KEEP HEALTHYWord limit: 160-200 wordsTime limit: 40 minutesYou are required to develop your essay according to the given topic sentence of each paragraph. 1. Nowadays more and more people are concerned about their health. 2. Medical researchers have proven that what people eat affects their health. 3. Getting rid of bad habits like smoking and drinking alcohol is also an important way to keep healthy.

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