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【简答题】
（8分）已知A、B、C、D、E是短周期中的5，它们的原子序数依次增大。A是原子半径最小的，C、D在周期表中处于相邻的位置，B原子的最外层电子数是内层电子数的2倍。E与D同主族；E的单质为黄色晶体，易溶于二硫化碳。回答下列问题： （1）D在周期表中的位置是 。 （2）画出E的阴离子的结构示意图： 。 （3）写出一种由A、B、C、D四种组成的离子化合物的化学式： 。 写出一种由A、C、D三种组成的共价化合物的化学式： 。 （4）将9 g B单质在足量的D单质中燃烧，所得气体通入1 L 1 mol·L － 1 NaOH溶液中， 完全吸收后，溶液中大量存在的阴离子是 。
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【单选题】What does the author mean by saying the Jews "have ceased to bother about overcrowding" in Paragraph 8?
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查看完整题目与答案
【单选题】What does the writer mean by saying the Jews "have ceased to bother about overcrowding"?
A.
They have moved out of this region.
B.
They have got used to such conditions.
C.
Their living areas have been extended.
D.
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查看完整题目与答案