试题与答案

一个圆柱与一个圆锥体积相等,底面积也相等,圆柱的高是12cm,圆锥的高是( )

题型:选择题

题目:

一个圆柱与一个圆锥体积相等,底面积也相等,圆柱的高是12cm,圆锥的高是(   )cm.
A.12B.24C.36D.4

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B, D, E解析:企业物流纵向层次的质量改进方法主要包括:对物流过程进行管理;具体有确定各部门任务、制定战略规划、明确作用和职责、获取和配置资源、提供教育和培训等;确定并策划各部门工作过程的...

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题型:填空题

World Water Shortage


A new study warns that about thirty percent of the world’s people may not have enough water by the year 2025.
A private American organization called (1) Action International did the new study. It says (2) than three-hundred-thirty-five-million people (3) enough water now. The people live in twenty-eight (4) . Most of the countries are in Africa or the (5) East.
P-A-I researcher Robert Engelman says (6) the year 2025, about three-thousand-million people (7) lack water. At least 18 more countries are (8) to have severe water problems. The demand (9) water keeps increasing. Yet the amount of water on Earth (10) the same.
Mr. Engelman says the population in countries that lack water is (11) faster than in other parts of the world. He says (12) growth in these countries will continue to (13) .
The report says lack of water in the future may (14) in several problems. It may increase health (15) . Lack of water often means drinking (16) not safe. Mr. Engelman says there are problems (17) over the world because of diseases, such as cholera, (18) are carried in water. Lack of water may also result (19) more international conflict. Countries may have to (20) for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.

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