判断下面句子是否正确,用对或错表示
题目
判断下面句子是否正确,用对或错表示
1.I were ten years old last year.
2.There were some water in the bottle.
3.Were you at school yesterday.
答案
1.错
2.错
3.对
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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