It is the first time that he has been to America,______? 此句的反义疑问句是.
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It is the first time that he has been to America,______? 此句的反义疑问句是.
答案
isn't it 一般情况下,主从句复合句构成的句子,反意部分和主句保持一致.如：I told that you should not do that again,didn't i 不过,如果主句是这样的；I thing / hope / believe / imagine that.反意部分就要和从...
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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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