英文句子变复数：1.Is he Russian?Yes,he is.2.Is she Dutch?No she isn·t No I am not.
题目
英文句子变复数：1.Is he Russian?Yes,he is.2.Is she Dutch?No she isn·t No I am not.
3.Is this your tie?No,it isn·t 4.What colour is your book?It is red and green.He is Russian.
急,急,急,急,急,急,急,急,急,急,急,急,急,
答案
1.Is he Russian?Yes,he is.【Are they Russians?Yes,they are.】2.Is she Dutch?No she isn·t No I am not.【Are they Dutch?No,they aren't.】3.Is this your tie?No,it isn·t 【Are these your ties?No,they ar...
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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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