对话 WOMAN：I like these glasses,but they look like they would be quite expensive
题目
对话 WOMAN：I like these glasses,but they look like they would be quite expensive
WOMAN：I like these glasses,but they look like they would be quite expensive
man:they are $15 a piece,or $150 a dozen.Really that's not very expensive.
Q:How much does one glass cost?
答案
女：我喜欢这些杯子,但看起来会好贵.
男：15美元一个,或者150美元十二个.真的不贵.
问：一个杯子多少钱?
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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