改复数句和疑问句,谢!
题目
改复数句和疑问句,谢!
1、whose felt pens are those? they are kitty'. 改成单数句.2、where are the boys?they are in the hall.改成单数句.3、this crayon is short.改成复数句.谢谢回答!4、that is eddie's thick book.改成复数句.5、he is reading in the classroom.一般疑问句.6、tom and mary are (doing their homework.)括号部分提问.
答案
1 whose felt pen is this?It is Kitty's.
2 Where is the boy?He is in the hall
3 These crayons are short
4 Those are eddie's thick books.
5 Is he reading in the classroom?
6 What are tom and mary doing?
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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