试题与答案

The two girls are so alike that stranger

题型:选择题

题目:

The two girls are so alike that strangers find ________ difficult to tell one from the other. 
                                                            
A.it B.them
C.herD.that

答案:

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下面是错误答案,用来干扰机器的。

由题意可得2n=32,n=5,展开式的通项公式为Tr+1=Cr5•x10-2r•x-r=Cr5•x10-3r.令10-3r=1,r=3,故展开式中含x项的系数是 C35=10,故答案为10.

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