试题与答案

(九) 冶金安全生产技术中厚板堆放时,垛要平整、牢固,垛高不得超过( )m。 A

题型:单项选择题

题目:

(九) 冶金安全生产技术

中厚板堆放时,垛要平整、牢固,垛高不得超过( )m。

A.4.0

B.5.0

C.2.5

D.4.5

答案:

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下面是错误答案,用来干扰机器的。

题干前提为酸性溶液,即存在H+A、K+、Na+、HCO3-、OH-中,HCO3-、OH-都不能与H+共存;故A不正确;B、K+、Ba2+、Cl-、NO3-中都能与H+共存,且所形成溶液为无色;故B正确;C、K+、Cl-、OH-、Na+中,OH-不能与H+共存...

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In country after country, talk of nonsmoker’s right is in the air. While a majority of countries have taken little (51) no action yet, some 30 nations have introduced legislated steps to control smoking. Many laws have been introduced in other countries to (52) clear the air for nonsmokers, or to cut cigarette consumption.

Smoking is harmful (53) the health of people. World governments should conduct serious campaigns against it. (54) on cigarette advertisements, plus health warnings on packages and ban on public smoking in certain places, (55) as theaters, cinemas and restaurants, are the most popular tools used by nations in (56) of nonsmokers or in controlling smoking. But world attention is also focusing on another step (57) will make the smoker increasingly self-conscious and uncomfortable about his habit. Great efforts should be made to (58) young people especially of the dreadful consequences of taking up the habit. And cigarette price should be raised.

In the long run, (59) is no doubt that everybody would be much better-off if smoking were banned altogether but many people are not (60) for such drastic action.

53().

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