we visited him at his workplace ___the young trees and ask him about his work.
题目
we visited him at his workplace ___the young trees and ask him about his work.
a.in b.among c.between d.at
he is ___the greatest scientist in the world.
a.among b.between c.in d.of
答案
d
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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