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问题 选择题

下列有关化学用语使用正确的是（　　）

A．NH4Br的电子式：

B．硝基苯的结构简式：

C．乙醛的分子式：C2H4O

D．甲烷分子的比例模型：

答案

A、NH4Br是离子化合物，有铵根离子与溴离子构成，电子式为，故A错误；

B、硝基苯的结构简式为，故B错误；

C、乙醛为甲基与醛基直接相连性形成，分子式为C2H4O，故C正确；

D、选项中是甲烷的球棍模型，甲烷的比例模型为，故D错误．

故选C．

单项选择题

People are indulging in an illusion whenever they find themselves explaining at a cocktail（鸡尾酒）party, say, that they are "in computers," or "in telecommunications," or "in electronic funds transfer". The implication is that they are part of the high-tech world. Just between us, they usually aren't. The researchers who made fundamental breakthroughs in those areas are in a high-tech business. The rest of us are(1)of their work. We use computers and other new technology components to develop our products or to organize our affairs. Because we go about this work in teams and projects and other tightly knit working groups（紧密联系在一起的工作小组），we are mostly in the human communication business. Our successes stem from good human interactions by all participants in the effort, and our failures stem from poor human interactions. 　　

The main reason we tend to focus on the(2)rather than the human side of the work is not because it's more(3), but because it's easier to do. Getting the new disk drive installed is positively trivial compared to figuring out why Horace is in a blue funk（恐惧）or why Susan is dissatisfied with the company after only a few months. Human interactions are complicated and never very crisp（干脆的，干净利落的） and clean in their effects, but they matter more than any other aspect of the work. If you find yourself concentrating on the(4)rather than the (5), you're like the vaudeville character（杂耍人物）who loses his keys on a dark street and looks for them on the adjacent street because, as he explains, "The light is better there!".

空白（5）处应选择（）

A.technology

B.sociology

C.physiology

D.astronomy
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单项选择题

在我国，社全主义的法是由国家权力机关和国家行政机关依法制定的，其他社会组织无权制定法。其中，( )有权制定和修订法律。

A．全国人民代表大会

B．全国人大常委会

C．国务院

D．省、自治区、直辖市人民政府
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