27.The servant asked,“Is there anything else I can do?”
题目
27.The servant asked,“Is there anything else I can do?”
A.The servant asked was there anything else he can do.
B.The servant asked there was anything else he could do.
C.The servant asked if there was anything else he could do.
D.The servant asked whether there was anything else he could do.
答案
c
AB显然不对.
whether要接not.
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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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