Do they have a computer?Does he have a tennis racket?Does she have a soccer ball?
题目
Do they have a computer?Does he have a tennis racket?Does she have a soccer ball?
Doer he have a ping-pong ball?这些句子怎么改陈述句和否定句
答案
They have a computer.They don't have a computer.He has a tennis racket.He doesn't have a tennis racket.She has a soccer ball.She doesn't have a soccer ball.He has a ping-pong ball.He doesn't have a pi...
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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