1.everything (has/have) been destroyed in the fire.
题目
1.everything (has/have) been destroyed in the fire.
2.she had a picnic with her family (in/at) the beach.
3.there were (much/little/a little/a few) people already in the hall when we arrived.
4.the man has not (return/returns/returned/returning) my call yet.
5.(do/did/is/are) everyone understand the lecture?
6.there were (many/much/a little/a large) people at the rally.
答案
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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