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【多选题】
关于吸热反应的说法正确的是(    )。
A.
凡需加热的反应一定是吸热反应
B.
反应物的总能量比生成物的总能量小
C.
氢氧化钠与盐酸的反应属于吸热反应
D.
C0 2 与CaO化合是放热反应，则CaC0 3 分解是吸热反应
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