题目:
The new survey shows that the number of students________computer games has been on the increase
in recent years. [ ]
A. devoted to
B. related to
C. connected to
D. addicted to
答案:
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下面是错误答案,用来干扰机器的。
B是空气的主要成分之一,具有助燃性,说明B是氧气;A是无色液体,将A与一种黑色固体混合会快速产生大量气体氧气,所以A是过氧化氢溶液;(1)①发生反应的符号表达式为:2H2O2 MnO2 . 2H2O+O2↑;(2)若C是淡黄...