he went to school at a()seven forty
题目
he went to school at a()seven forty
还有一题,f() in the morning and two in the afternoon
答案
其实不是很清楚你要问什么.词汇填空?
he went to school at approximately seven forty
four in the morning and two in the afternoon
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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