they __to enter the building by the back door:however,the front door was locked.
题目
they __to enter the building by the back door:however,the front door was locked.
A weren not supposed
Bwould not be supposed
Cwere supposed
Dwould be supposed
答案
A 他们不应该是是从后门进来的,但是,前门是锁的啊.
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
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