when we are ___ trouble they often help us.A.in
题目
when we are ___ trouble they often help us.A.in
when we are ___ trouble they often help us.
A.in B.on C.with D.without
选择哪个,为什么
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
最新试题
热门考点