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小明在实验室用天平和量筒测量矿石的密度。

上一题 下一题 0.0难度 选择题 更新时间:2015-11-11 07:30:05

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如图为心脏结构示意图,有关叙述错误的是(   )

同类题2


的解集为( )

同类题3

如图,在△ABC中,分别以点A,B为圆心,大于 12 AB长为半径画弧,两弧分别交于点D,E,则直线DE是(   )

同类题4

阅读理解

    My friend Tom is a schoolboy. Everyone likes him very much because he is kind. He likes to help people. He is a smart boy and he can play many musical instruments(乐器). After school, when he is with his friends, he often plays musical instruments for them. On weekends, he is free and he always goes to the old people's home. He plays the violin and the guitar to make them happy. He thinks it's interesting and fun.

    Today is February 28th. It's Tom's birthday. He has a big and interesting party at home. Many friends come to his party. Tom's mother cooks a lot of food for them. Everyone gives a beautiful gift to him. Sally gives him an English dictionary because Tom also likes English. Bob gives Tom a guitar because he likes playing the guitar very much. At the party, Tom plays the guitar and he also plays the piano. We sing many songs and play some interesting games. We have a good time today.

同类题5

下图为神经元动作电位的示意图,下列有关分析正确的是(  )

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