The students came back to their classroom in?
题目
The students came back to their classroom in?
A.two and three B.twos and threes C.two or three D.threes or twos
答案
B.twos and threes
twos and threes “三三两两” 固定搭配没什么可解释了.
by/in twos and threes 三三两两
in threes and fours 三五成群
at sixes and sevens 乱七八糟
1.They came home from church by twos and threes.
他们三三两两地从教堂回来.
2.They sat in twos and threes on the trim barbered lawn.
他们三三两两地坐在修剪平整的草坪上.
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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