He shot at the birds in the tree and they flew _____.
题目
He shot at the birds in the tree and they flew _____.
A. in all direction B. in one direction C. to all directions D. about the directions
A. in all directions B. in one direction C. to all directions D. about the directions
A or C?
答案
A.记住了,directions与in搭配使用,是固定用法.其它的都不用考虑.
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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