why are you so popular with your students?--As a teacher,I seldom gibe my stdents so diffivult a pro
题目
why are you so popular with your students?--As a teacher,I seldom gibe my stdents so diffivult a problem__tyr cant work out.
A as B that C if D in order that
选A 为什么不是B?
答案
首先so..that句型引导的是结果状语从句,所以that后面是一个完整的句子.如果本题改成……work it out,就必须用that.
而so...as 句型是个特殊的定语从句（因为前面是so /such 而用as）,as做句中成分,所以后面可以没有it.
详情百度so that /so as区别
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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