All the parents were invited to ___ school to learn how their children were doing in ___ school.A.不填
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All the parents were invited to ___ school to learn how their children were doing in ___ school.A.不填,不填 B.the,a C.不填,the D.the,不填 最好带理由,我不知道是A还是B,搞不懂
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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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