下列反应中,属于吸热反应的是 A.活泼金属跟酸反应          

下列反应中,属于吸热反应的是

A.活泼金属跟酸反应                            B.制造水煤气

C.酸碱中和反应                                 D.镁条燃烧

答案

B

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