看看这道英语语法题.....
题目
看看这道英语语法题.....
-------you-------further problems with your printer,contact your dealer for advice.
A.If,had
B.Have,had
C.Should,have
D.In case,had
答案
考察的是 if 非真实条件句的省略/ 倒装,应该选择c.原形是if you should have further problems with your printer,./改为Should you have further problems with your printer,.
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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