简便计算． （20+4）×25723-79-32137×99+3759+79+4

下列关于分子的叙述正确的是（　　）

A．分子是化学变化中的最小粒子

B．分子是保持物质化学性质的最小粒子

C．分子是静止不动的

D．分子间紧密排列没有间隔

金属材料在生产和生活中有着广泛的应用．

（1）下列物质中不属于合金的是　       　（填字母）．

A．金刚石     B．不锈钢    C．生铁

（2）铜可制成导线，主要是因为铜具有良好的　         　．

（3）黄金在自然界中主要以单质形式存在，原因是　         　．

（4）铁制品锈蚀的过程，实际上是铁跟空气中的　        　和水蒸气等发生了化学反应．为防止铁制栏杆生锈，通常采取的措施是　       　．

（5）某溶液中含有硫酸铜和硫酸锌，向其中加入过量的铁粉，充分反应后过滤，滤渣中一定含有　        　．

根据我国建筑法的规定，工程监理单位不按照委托监理合同的约定履行监理业务，对应当监督检查的项目不检查或者不按照规定检查，给建设单位造成损失的，应当承担( )责任。

A．行政

B．有限赔偿

C．刑事法律

D．完全赔偿

An editorial in the Grandbury Daily Herald claims that Grandburg’s voters would generally welcome the defeat of the political party now in control of the Grandburg City Council. The editorial bases its claim on a recent survey that found that 59 percent of Granburg’s registered voters think that the party will definitely be out of power after next year’s city council elections.
Which one of the following is a principle that, if established, would provided the pest justification for the editorial’s conclusion

A．The way voters feel about a political party at a given time can reasonably be considered a reliable indicator of the way they will continue to feel about that party, barring unforeseeable political developments.

B．The results of surveys that gauge current voter sentiment toward a given political party can legitimately be used as the basis for making claims about the likely future prospects of that political party.

C．An increase in ill-feeling toward a political party that is in power can reasonably be expected to result in a corresponding increase in support for rival political parties.

D．The proportion of voters who expect a given political possibility to be realized can legitimately be assumed to approximate the proportion of voters who are in favor of that possibility being realized.

E．(E) It can reasonably be assumed that registered voters who respond to a survey regarding the outcome of a future election will exercise their right to vote in that election.