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【简答题】
乙酸酐是有机化学品,无色透明液体。有强烈的乙酸气味。味酸。有吸湿性有腐蚀性。勿接触皮肤或眼睛,以防引起损伤。有催泪性。 商品编码是( )
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皮皮学刷刷变学霸
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【简答题】B. Listen again. Complete the statements and answer the questions. 1. Statements 1) The family is a group of people related by , living together or with one another for __. 2) The purpose of a family ...
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