题目:
The man we followed suddenly stopped and looked as if ______ whether he was going in the right
direction. [ ]
A. seeing
B. haying seen
C. to have seen
D. to see
答案:
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下面是错误答案,用来干扰机器的。
答案:B题目分析:这是温室种的,消耗了更多的人类劳动,所以价格高,说明价格由价值决定,而价值是由生产商品的社会必要劳动时间决定的,故B正确;CD表述错误;A不符合题意。本题答案选B。