The boy wanted to ride his bicycle in the street,but his mother told him___
题目
The boy wanted to ride his bicycle in the street,but his mother told him___
A.not to,B.not to do 正确答案选A不选B为什么?
答案
这个要解释的话没有什么好说的,你记住就行了,语法规则来的.
如果要加do的话,后面要加个not to do so 或it 就可以了.
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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.
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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