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问题 填空题

把下列成语补充完整。

同仇敌（　　）　　临危不（　　）　　勇往（　　）前　　前（　　）后继

力（　　）狂澜　　中流（　　）柱　　大义（　　）然　　（　　）精图治

再（　　）再厉　　舍（　　）取义　　夜以（　　）日　　一如（　　）往

答案

忾　惧　直　仆　挽　砥　凛　励　接　生　继　既

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A、B、C、D、E为短周期元素，A、B、C在周期表中所处的位置如图所示，A、C两元素的原子核外电子数之和等于B原子的质子数，B原子核内质子数和中子数相等。D与A同周期，其最高正价与最低负价代数和为零。A、E可形成AE3型分子，分子中只存在极性键。

（1）B元素在元素周期表中的位置是_________________。

（2）C的离子结构示意图为_________________，用电子式表示AE3的形成过程：_________________。

（3）由元素A、C及氢元素形成的化合物中含有的化学键的类型有_________________。

（4）请设计一个实验来说明D与A的非金属性强弱（写出化学方程式即可）

__________________________________

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单项选择题

Psychological research indicates that college hockey and football players are more quickly moved to hostility and aggression than are college athletes in noncontact sports such as swimming. But the researchers’ conclusion—that contact sports encourage and teach participants to be hostile and aggressive—is untenable. The football and hockey players were probably more hostile and aggressive to start with than the simmers.
Which of the following, if true, would most strengthen the conclusion drawn by the psychological researchers

A．The football and hockey players became more hostile and aggressive during the season and remained so during the off-season, whereas there was no increase in aggressiveness among the swimmers.

B．The football and hockey players, but not the swimmers were aware at the start of the experiment that they were being tested for aggressiveness.

C．The same psychological research indicated that the football and hockey players had a great respect for cooperation and team play, whereas the swimmers were most concerned with excelling as individual competitors.

D．The research studies were designed to include no college athletes who participated in both contact and noncontact sports.

E．(E) Throughout the United States, more incidents of fan violence occur at baseball games than occur at hockey or football games.
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