she gave him a piece of cheese he put the ( )of cheese in his pocket a bit b bar c block d packet
题目
she gave him a piece of cheese he put the ( )of cheese in his pocket a bit b bar c block d packet
答案选的A为什么啊
答案
a bit of ：一点
a bar of ：一块
a block of ：一块
a packet of ：一包
它前面提到是一片奶酪,用排除法,B,C一块奶酪当然不合适,而D一包奶酪更不符合常理
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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