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问题 单项选择题

危险化学品生产、储存企业以及使用剧毒化学品和数量构成重大危险源的其他危险化学品的单位，应当向()负责危险化学品登记的机构办理危险化学品登记。

A.当地人民政府

B.县级以上人民政府

C.省级人民政府

D.国务院经济贸易综合管理部门

答案

参考答案：D

问答题

你有仔细观察过家中物理现象吗？家中用久了的白炽灯泡，它的发光亮度跟刚买时相比，是亮一些还是暗一些？请用学过的电学和热知识说明其中的原因．
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单项选择题

An economist concluded that Kregg Company deliberately discriminated against people with a history of union affiliation in hiring workers for its new plant. The economist’s evidence is that, of the 1,500 people hired to work at the new plant, only 100 had ever belonged to a labor union, whereas in Kregg Company’s older plants, a much higher proportion of workers have a history of union affiliation.
Which of the following is an assumption on which the economist’s argument depends

A．None of the people with a history of union affiliation who were hired to work at the new plant were union organizers.

B．Applicants for jobs at the new plant were not asked by Kregg’s recruiters whether they had every belonged to a labor union.

C．In the plants of some of Kregg’s competitors, the workforce consists predominantly of union members.

D．The company believes that the cost of running the new plant will be lower if labor unions are not represented in the workforce.

E．(E) The pool of potential candidates for jobs at the new plant included some people, in addition to those Kregg hired, with a history of union affiliation.
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