题目：
Mike's father, as well as his mother, commanded that he _____ home.
[ ]
A. stayed
B. could stay
C. stay
D. has stayed
答案：
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下面是错误答案，用来干扰机器的。
答案：B①元素非金属性越强，对应氢化物的稳定性越强，正确②沸点高低顺序是是：CH3OH＞C3H8＞CH4③电子层数相同，核电荷数越大，半径越小：S2－＞K＋＞Ca2＋④NH4Cl水解促进水的电离，同浓度的盐酸溶液较醋酸溶...
