请问There are some pens and rulers in the pencil-box.改为一般疑问句怎么改
题目
请问There are some pens and rulers in the pencil-box.改为一般疑问句怎么改
Are there__ pens __rulers in the pencil-box?
答案
请问There are some pens and rulers in the pencil-box.改为一般疑问句怎么改Answer:Are there pens rulers in the pencil-box?注：(1)一般疑问句"some"要变成"any",但在表示期望得到肯定回答的建议中一般some可...
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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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