用1 These are...2 Those are.3 They are...4 This is...5 That is...6 He/ she/ it is 来照句
题目
用1 These are...2 Those are.3 They are...4 This is...5 That is...6 He/ she/ it is 来照句
答案
1 These are books.
2 Those are my friends.
3 They are my classmates.
4 This is a book.
5 That is a pen.
6 He is in Grade 1.
She is in Grade 1,too.
It is a cat.
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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