" she has a headache because she"
题目
" she has a headache because she"
8.She ought to stop work; she has a headache because she ________ too long.
A.has been reading
B.had read
C.is reading
D.read
觉的是A,又怕是别的
答案
选A!
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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