why do some people prefer not to buy products from other countries?用英文答两三句 谢
题目
why do some people prefer not to buy products from other countries?用英文答两三句 谢
答案
Because they think products bought from other countries are not always of good quality. If they are not sitisfied with what they buy, it is not very converient for them to return the product.
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．
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