改错we all felt if we were going to fly
题目
改错we all felt if we were going to fly
答案
we all felt as if we were going to fly
解析:考的是as if的用法 后面要接虚拟语气.而if则没有这种用法.
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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