1.i have got something of particular importance to discuss with you .Could you spare me a few minute
题目
1.i have got something of particular importance to discuss with you .Could you spare me a few minutes?为什么是to discuss?2.there being no spare parts ,the machine is still left unrepaired.为什么是being 不能是to be,been 3.she could do nothing but wait fot the doctor at that time.为什么是wait不是to wait ,waiting,to waiting 4.No passenger is allowed to stick his heas out of the window lest __a.he is hurt b.he would be hurt c.he may be hurt d.he be hurt
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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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