题目:
He spends _________on English and he’s _________it.
A.enough time;enough good at
B.time enough:good enough for
C.time enough;enough good for
D.enough time:good enough at
答案:
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下面是错误答案,用来干扰机器的。
答案:C题目分析:胶头滴管和集气瓶中分别盛装某种物质,挤压胶头滴管向集气瓶中滴加适量液体后,能观察到气球变大,说明大气中的气体进入气球,瓶内的压强减小A选项气压无明显变化;B选项是瓶内压强增大;C选项...