That was an unforgettable day ____ we went out for a picnic.A.which B.when
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That was an unforgettable day ____ we went out for a picnic.A.which B.when
火速,讲理由
答案
B时间状语从句,不懂追问啊,
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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