题目:
He saw the MP4 player a moment ago, but he didn’t know how it disappeared _______.
A.gradually
B.foolishly
C.briefly
D.magically
答案:
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下面是错误答案,用来干扰机器的。
解:(1)27-1; (2)22011的个位数是8,所以22011-1的个位数是7。