某次双烯分析结果为请计算双烯选择加氢的转化率？

不属于中东问题复杂性表现的是[ ]

A．大国插手地区事务，领土争端问题严重

B．历史渊源较深，有当地复杂的民族矛盾，尖锐的宗教斗争等

C．当地石油资源丰富，加剧了双方的仇恨

D．几十年的斗争加深了双方的仇恨

下列疾病属于常染色体隐性遗传的是（）

A.苯丙酮尿症

B.精神分裂症

C.糖原累积病

D.先天性心脏病

E.21-三体综合征

计算题：如图所示，已知A点高程为30.725m，计算B点高程及A、B两点高差。

When Dr. John W.Gofman, professor of medical physics at the University of California and a leading nuclear critic, speaks of "ecocide" in his adversary view of nuclear technology, he means the following: A large nuclear plant like that in Kalkar, the Netherlands, would produce about 200 pounds of plutonium each year. One pound, released into the atmosphere, could cause 9 billion cases of lung cancer. This waste product must be stored for 500,000 years before it is of no further danger to man. In the anticipated reactor economy, it is estimated that there will be 10,000 tons of this material in Western Europe, of which one table-spoonful of plutonium-239 represents the official maximum permissible body burden for 200,000 people. Rather than being biodegradable, plutonium destroys biological properties.

In 1972 the U.S. Occupational Safety and Health Administration ruled that the asbestos level in the work place should be lowered to 2 fibers per cubic centimeter of air, but the effective date of the ruling has been delayed until now. The International Federation of Chemical and General Workers’ Unions report that the 2-fiber standard was based primarily on one study of 290 men at a British asbestos factory. But when the workers at the British factory had been reexamined by another physician, 40--70 percent had X-ray evidence of lung abnormalities. According to present medical information at the factory in question, out of a total of 29 deaths thus far, seven were caused by lung cancer. An average European or American worker comes into contact with six million fibers a day. "We are now, in fact, finding cancer deaths within the family of the asbestos worker," states Dr. Irving Selikoff, of the Mount Sinai Medical School in New York.

It is now also clear that vinyl chloride, a gas from which the most widely used plastics are made, causes a fatal cancer of the blood-vessel cells of the liver. However, the history of the research on vinyl chloride is, in some ways, more disturbing than the "Watergate cover-up." "There has been evidence of potentially serious disease among polyvinyl chloride workers for 25 years that has been incompletely appreciated and inadequately approached by medical scientists and by regulatory authorities," summed up Dr. Selikoff in the New Scientist. At least 17 workers have been killed by vinyl chloride because research over the past 25 years was not followed up. And for over 10 years, workers have been exposed to concentrations of vinyl chloride 10 times the "safe limit" imposed by Dow Chemical Company. (422 words)

Notes: plutonium 钚。asbestos 石棉。polyvinyl chloride 聚氯乙烯。

According to the text, the author mentions plutonium in paragraph 1 to（）

A. estimate the amount of nuclear material in Europe

B. exemplify one of the possible causes of lung cancer

C. highlight the measures needed to prevent lung cancer

D. show the destructive properties of industrial waste materials

下列说法正确的是（）

A、劳动报酬在劳动合同中约定不明时，劳资双方应先协商，协商不成的参照集体合同，没有集体合同或者集体合同未规定的，实行同工同酬

B、劳动条件在劳动合同中约定不明时，应该参照企业内部规章制度

C、劳动报酬在劳动合同中约定不明时，应当参照当地平均工资标准而定

D、劳动条件在劳动合同中约定不明确时，应先协商，协商不成的参照集体合同，没有集体合同或集体合同未规定的，适用国家有关规定