Lily will give a talk to us tomorrow.She is thinkong about
题目
Lily will give a talk to us tomorrow.She is thinkong about
A what to say B what to speak
答案
Lily will give a talk to us tomrrow.She is thinking aboutA.What to saySpeak is a present tense.Say is a future tence.Since she is speaking tomrrow.It would be a future tence.
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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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