题目

我们每天生活在不断变化的物质世界里，以下属于化学变化的是  A. 冰雪融化      B. 干冰升华     C. 蜡烛燃烧     D. 菠萝榨汁 答案：C---Do you believe his words? ----No, what he said was________. A．less convincing                         B．more convincing C．less convinced                          D．more convinced