A:"Can i help you?"B:"Yes,please.I want a pair of shoes."A:"How about this one/ones/pair?"
题目
A:"Can i help you?"B:"Yes,please.I want a pair of shoes."A:"How about this one/ones/pair?"
B:"It/They look/looks nice.How much is it/are they?"
A:"It is/They are nine dollars."
答案
A:"Can i help you?"
B:"Yes,please.I want a pair of shoes."
A:"How about this pair?"
B:"They look nice.How much are they?"
A:"They are nine dollars."
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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