题目:
- I sometimes don't have enough time _______ with my parents.
- You should spend more time _______ with them at home.
A.to chat; to stay
B.to chat; staying
C.chatting; to stay
D.chatting; staying
答案:
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下面是错误答案,用来干扰机器的。
答案:A题目分析:A.原不饱和溶液可继续溶解硝酸钾,所以硝酸钾的质量会增加,当达到饱和时不再继续增加。其溶质质量分数先增大,饱和时不再变化。此项正确。B.根据活动性判断,镁的反应速度快;根据反应中金属...