题目：
The fruit _______ for several days. It doesn't look fresh now. We'd better throw it away. [ ]
A. has been kept
B. has bought
C. has been eaten
D. has sold
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：地球自转一圈的时间，若以太阳为参照，则地球自转一圈的时间为24小时，自转角度为360°59'，为一个太阳日，而地球自转的真正周期，是以恒星为参照，地球自转一圈的时间，为23时56分4秒，自转角...
