摘要:以下属于化学学科研究内容的是······························································ ---( ) A.汽车行驶中的加速, B.山羊和绵羊的DNA杂交.生产出一种特殊的动物--绵山羊, C.风力发电机将风能转化为电能, D.在大洋深处发现一种可燃“冰 .研究它的组成.性质和用途.

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