---Hi, Mike! How is it going? ---Not so good. I’m having trouble ________my new car. A. in B. on
题目
---Hi, Mike! How is it going? ---Not so good. I’m having trouble ________my new car. A. in B. on
---Hi, Mike! How is it going?
---Not so good. I’m having trouble________my new car.
A.
in B. on
C. with D. about
老师给的答案是C，why？我已经懵圈了！！！
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
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