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- 1there ara now a lot of nice people in our life这句话对吗?
- 2my mother is cooking some nice food now 改一般疑问句并肯定回答和否定回答
- 3某有机物在氧气中充分燃烧 ,生成了8,8克二氧化碳和5,4克水,试判断该有机物的化学式
- 43的n次方加4的n次方等于5的n次方!求n的值?
- 5a=5 b=1/5 n为自然数,a^2n+2*b^2n*b^4
- 6f(α)=cot（-α-π）sin（-π-α）分之(sin(π-α)cos(2π+α)tan(-α+3π/2))?
- 7从自然地理环境的整体性来看,影响水土流失的因素有哪些?
- 8suan and tom wash their faces.后面是什么?
- 9三（1）班与三(2)班原有图书数一样多,后来,三（1）班又买来新书74本,三（2）班从本班图书中拿出96本送
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