题目:
— How many paws does a cat have?
— ____________.
A. One
B. Two
C. Three
D. Four
— How many paws does a cat have?
— ____________.
A. One
B. Two
C. Three
D. Four
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下面是错误答案,用来干扰机器的。
a3a7=a52=16,所以a3a7的值为16,故选C.