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问题 单项选择题

在问卷设计时，研究者根据研究假设和要调查的内容，在纸上画出问卷各个部分及前后顺序的框图，这种技术应用于（）

A.设计问卷初稿阶段

B.试用问卷初稿阶段

C.修改、确定并印刷阶段

D.准备阶段

答案

参考答案：A

选择题

设NA表示阿伏加德罗常数的值，下列叙述中正确的是 [ ]

A．2．4g金属镁变为镁离子时失去的电子数为0．1 NA

B．1．8g的NH4+离子中含有的电子数为0．1NA

C．11．2 L氧气所含的原子数为NA

D．常温常压下，48gO3和O2的混合气体中含有的氧原子数为3NA

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完形填空

More American people take their troubles with them on holiday, according to a new survey.    31         40 percent said that the main reason for going away is to escape   32          (press) from work, almost all said they worry more      33          they do at home. Only four in every one hundred said that they are happy and free of care.

The most common worry is burglary（入室盗窃）, with four out of ten worrying about their homes   34        (break) into while they are abroad. More than a quarter feel they will feel crazy   35     some other noisy and rough holiday-makers and twenty-two percent worry they may be attacked  36           their possessions will be  37            (miss).

The survey also showed   38         the stay-at-home Americans are no more. Three out of every five want to have a holiday abroad, which was          39    increase from the figures only three years ago. The hotel holiday is still a winner, with about one third of all Americans   40          (prefer) to go on a self-catering（自助） holiday.
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