If everyone makes a contribution_____the environment,our country will become more beautiful.
题目
If everyone makes a contribution_____the environment,our country will become more beautiful.
A.to protect B.in protecting
C.protecting C.for protecting
请说明理由!
答案
A
查下字典就清楚啦~固定搭配
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