皮皮学，免费搜题
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【单选题】
下列晶体中,属于离子晶体的是A.
干冰
B.
金刚石
C.
氯化钙
D.
乙醇
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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A.
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B.
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C.
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D.
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A.
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B.
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D.
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