为妥善保管档案，缓解供需矛盾，可采用______的形式开展档案利用工作。A．制发档案

现有5根小木棒，长度分别为：2、3、4、5、7( 单位：cm) ，从中任意取出3根．

(1) 列出所选的3根小木棒的所有可能情况；

(2) 如果用这3根小木棒首尾顺次相接，求它们能搭成三角形的概率

阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上（请注意问题后的字数要求）。

〔1〕Secondhand smoke is a byproduct of cigarette, cigar or pipe smoking．Secondhand smoke occurs when tobacco burns or when smokers exhale, and it is inhaled involuntarily by non-smokers．

〔2〕Secondhand smoke___________________．The first is called side stream smoke, which is the smoke released from the burning end of a cigarette or cigar, or from tobacco burning in the bowl of a pipe．The second is called mainstream smoke, which is exhaled by a smoker．

〔3〕When nonsmokers are exposed to secondhand smoke, they inhale many of the same cancer-causing chemicals that smokers inhale．According to the U．S．Surgeon General, cigarette smoke contains more than 4,000 chemical compounds, including more than 50 cancer-causing chemicals, and at least 250 chemicals that are either toxic or carcinogenic．

〔4〕Both side stream and mainstream smoke are dangerous to nonsmokers．Side stream smoke is generated at lower temperatures and under different conditions than mainstream smoke．As a result, it contains higher concentrations of many of the toxins found in cigarette smoke．

〔5〕Secondhand smoke has been designated as a known human carcinogen by the U．S．Environmental Protection Agency, the National Toxicology Program, and the International Agency for Research on Cancer．Secondhand smoke also is listed as an occupational carcinogen by the National Institute for Occupational Safety and Health．

〔6〕According to the 2006 report by the U．S．Surgeon General, there is no risk-free level of exposure to secondhand smoke: even small amounts of secondhand smoke exposure can be harmful to people’s health．Separating smokers from nonsmokers, cleaning the air, and ventilating buildings can help．However, they cannot eliminate the exposure of nonsmokers to secondhand smoke．

小题1:What is the main idea of the text? （no more than 10 words）

小题2:Which sentence in the text is closest in meaning to the following one?

In whatever way, people can’t get rid of the risk of nonsmokers to secondhand smoke completely．

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小题3:Fill in the blank in Paragraph 2 with proper words．（no more than 8 words）

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小题4:Name at least three ways that will help reduce the harm of secondhand smoke．（no more than 12 words）

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小题5:Translate the underlined sentence in Paragraph 3 into Chinese．

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透平膨胀机的超速运转（飞车）现象、危害及原因分析？

对（）压缩广泛的采用了JPEG算法标准

A.静止图像

B.动态图像

C.声音

D.文本

【问题3】 公司内电话、传真机与ISDN的连接情况如图1-4所示。将图中(1)、(2)处空缺的设备名称填写在答题纸相应位置。