NA代表阿伏加德罗常数，下列说法正确的是 （ ）
A．常温常压下，30克乙酸与30克葡萄糖含有的氧原子数均为NA
B．在标准状况下，11．2 L O2和22．4 L NO混合并充分反应后得到的气体分子数为NA
C．3．65克液态HCl中构成粒子的总数为0．2NA
D．常温下5．6克铁投入到足量浓硝酸中反应，转移电子数为0．3NA
答案：A
A．两物质的最简式均为CH2O，即30克物质中均有NA碳原子，正确
B．由于：2NO＋O2=2NO2 2NO2
N2O4，所以最终得到的混合气体分子数少于NA
C．液态HCl是由分子构成，故构成粒子的总数为0．1NA
D．常温下铁与浓硝酸钝化，错误
答案为A
In some cities, workaholism(工作狂)is so common that people don’t consider it unusual, they accept the lifestyle as ____11____. Government worker in Washington D.C, ____12___, frequently work sixty to seventy hours a week. They don’t do this because they have to; they do it because they ___13___to. Workaholism can be a ___14___problem. Because true workaholism would rather work than do anything else, they___15___have no idea of how to relax; that is, they might not ___16___movies, sports, or other types of entertainment. Most of all, they ___17___ to sit and do nothing. The lives of workaholics are usually stressful, and this tension (紧张) and worry can cause___18___problems such as heart attacks and stomach disease. ___19___, typical workaholics don’t pay much attention to their families. Their marriages may end in___20___ as they spend little time with their families. Is workaholism___21___dangerous? Perhaps not. There are, certainly, people who work ___22___under stress. Some studies show that many workaholics have great energy and interest in work. They feel ___23___ is so pleasurable that they are actually very happy. For most workaholics, work and entertainment are the same thing. Their jobs___24___them with challenge; this keeps them busy and creative. Why do workaholics enjoy their jobs so much? There are several factors to work. Of course, it provides people with paychecks. But it offers more than financial security. It provides people with self-confidence; they have a feeling of satisfaction ___25___ they have produced a challenging piece of work.
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