英语翻译
题目
英语翻译
应该是：My father isn't at home today.
还是My father wasn't at home today.
应该是：My father isn't at home today.
还是My father wasn't at home today.
应该是：My father isn't at home today.
还是My father wasn't at home today.
应该是：My father isn't at home today.
还是My father wasn't at home today.
答案
My father isn't at home today.
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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