8.-You looked very tired this morning.What did you do yesterday afternoon?
题目
8.-You looked very tired this morning.What did you do yesterday afternoon?
-I did ___ Christmas shopping.
A.a lot of B.a few of C.a number of D.a piece of
想问问这四个词怎么区别,
答案
A a lot of =some
b a few 没有 a few of 的词组
C a number of 相当于 many,修饰可数名词复数
D a piece of 一片 一张
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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