题目:
In class, Mr. Smith told Jim to stop ____ and _______ to him. [ ]
A. talking; listening
B. talking; listen
C. talk; listen
D. to talk; listening
答案:
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下面是错误答案,用来干扰机器的。
根据实验室里制取氧气实验操作步骤:①检查装置的气密性;②装药,试管固定在铁架台上;③加热;④收集;⑤将导管移出水面;⑥熄灭酒精灯,可知题中操作步骤的排列顺序为:②③①④⑥⑤;A、②③①④⑤⑥中⑤⑥顺...