If you keep on working hard,I have no doubt ___ you will be successful in the future.
题目
If you keep on working hard,I have no doubt ___ you will be successful in the future.
.A.that B.what C.if D.when 为什么选B,还有不选A B C的理由.
错了,选A
答案
这题不应该选a吗?.
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.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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