如何检查交流屏上两路输入电源的相位差？

英国人类学家特纳认为，正常的“社会结构”是一种有阶层、地位、贫富差别的体制，“反结构”是没有等级之分、贫富之别、男女之别的时空，具有消除不满和发泄情绪的功能，很多重要节庆仪式就是属于“反结构”。中国古代元宵节是全民的狂欢节。在节日期间，人人尽兴而乐，可以缓解平时身体上的疲劳和精神上的压力，节日期间的一些反常行为，有利于消除人与人之间的隔阂和紧张，促进入际关系的和谐。节日期间，不分地位高低，不分富贵贫贱，不分年龄大小，君民同乐，有利于促进不同阶层的和谐，保障社会稳定。

这段文字的主要观点是（）。

A．中国古代的元宵节是“反结构”的社会产物

B．中国古代的元宵节具有消除社会不满的功能

C．应大力发展传统文化中“反结构”的节庆仪式

D．“反结构”的节庆仪式有利于社会的稳定和谐

       美国总统罗斯福早年曾在军界服务。他的一位朋友想从他的嘴里打听一项机密。罗斯福当然不能泄密，但他不愿意伤害朋友。于是他悄悄地向朋友说：“你能保守机密吗？”那位朋友以为罗斯福要他保证不向别人说才肯将机密告诉他，于是便连声答：“当然，我一定保守机密，不告诉别人！”这时，罗斯福说：“____________”这句话把那位朋友堵得一句也说不出来。罗斯福的回答非常巧妙，请选择一句最符合该交际情境的话。 [ ]

A．那我就告诉你吧，不过你不能告诉别人。

B．你能保守机密，那么，我也能！

C．既然是机密，怎么好告诉别人？

D．我上次告诉你一项机密，结果满世界都知道了。

某股份有限公司有关资料如下。

资料一：公司本年年初未分配利润贷方余额为1819.2万元，本年息税前利润为8000万元，适用的所得税税率为33%。

资料二：公司流通在外的普通股600万股，发行时每股面值1元，每股溢价收入9元；公司负债总额为2000万元，均为长期负债，平均年利率为10%，假定公司筹资费用忽略不计。

资料三：公司股东大会决定本年度各按10%的比例计提法定公积金和法定公益金。本年按可供投资者分配利润的16%向普通股股东发放现金股利，预计现金股利以后每年增长6%。

资料四：该公司股票的贝塔系数为1.5，无风险收益率为8%，市场上所有股票的平均收益率为14%。

要求：

计算该公司本年应计提的盈余公积金。

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.

It can be inferred from the text that the author believes that（）

A. nationwide application of anti-pollution devices can finally prevent cancer

B. tough legislation is needed to set lower limits of worker exposure to harmful chemicals

C. more research is required into the causes of cancer before further progress can be made

D. industrialization must be slowed down to prevent further spread of cancer-causing agents

BJ007对含有易燃、易爆介质容器的清洗置换，不能用的置换介质为（）。

A.加水排气

B.惰性气体

C.氢气

D.吹扫蒸气