物质由微观粒子构成,下列物质由离子构成的是

物质由微观粒子构成,下列物质由离子构成的是

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某品牌牙膏包装盒上部分说明的碳酸钙和水都属于() 

某品牌牙膏包装盒上部分说明的碳酸钙和水都属于()

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We’d like two ____________ (碗) of noodles.

We’d like two ____________ (碗) of noodles.

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He plays very ____________. ( )

He plays very ____________. ( )

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—____________ shall we have it? ( ) —On our playground.

—____________ shall we have it? ( ) —On our playground.

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