1.Three ducklings are yellow and lovely.（对 yellow and lovely提问）
题目
1.Three ducklings are yellow and lovely.（对 yellow and lovely提问）
2.There are four eggs in the nest.（对four提问）
3.Mother Duck is making a nest.（一般疑问句）
4.It‘s a beautiful swan.（改写成感叹句）
5.There are three ducklings on Mother Duck‘s back.（对three ducklings提问）
答案
2 How many eggs are there in the nest?3.Is Mother Duck making a nest?4.What a beautiful swan it is!或者 how beautiful a swan it is!5.What are there on Mother Duck's back?
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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