将下列句子改成一般疑问句,并作肯定回答和否定回答.
题目
将下列句子改成一般疑问句,并作肯定回答和否定回答.
1.This is Ging 2.That is his brother.3.He is my good friend 4.These are nice pintures.5.Thse are school things.
答案
Is this Ging?--Yes,it is./No,it isn't.
Is that his brother?--Yes,it is./No,it isn't
Is he your good friend?--Yes,he is./No,he isn't.
Are these nice pictures?--Yes,they are./No,they aren't.
Are these school things?--Yes,they are./No,they aren't.
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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