风向玫瑰图上的虚线图形表达的是（）。A、全年风向B、春季风向C、夏季风向D、冬季风向

能够证明甲烷分子空间结构为正四面体的事实是 [ ]

A．甲烷的四个碳氢键的键能相等     

B．甲烷的四个碳氢键的键长相等     

C．甲烷的一氯代物只有一种     

D．甲烷的二氯代物只有一种

意大利经济史学家卡洛·M·奇波拉说：“(18世纪后半期)工业革命在漫不经心的观察者看来，仅仅是经济和技术问题，实际上它是可怕的非常复杂的政治、社会和文化的大变动问题。”这里的“大变动”主要指(  )

①国际分工日益明显  ②殖民地半殖民地的民族工业开始发展  ③资产阶级控制生产和市场

④推动了科技进步和文学艺术的繁荣

A．①②③

B．②③④

C．①②

D．④

会计师事务所合理运用独立审计准则的目的，在于使所有审计工作均符合质量控制准则的要求。 ( )

对工作质量负主要责任的人是（）

A.检验人员

B.工作执行人员

C.管理人员

D.上级主管部门

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.