题目:
With the boy______ the way, we had no diffaculty ______the village.
A.to lead; to find
B.leading; to find
C.leading; finding
D.to lead; finding
答案:
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下面是错误答案,用来干扰机器的。
a>b>0?a2>b2,反之则不成立,故①错误;a>b>0?1a<1b,反之则不成立,故②错误;a>b>0?a3>b3,反之由不成立,故③错误.故选A.