题目: 下列变化中属于吸热反应的是 [ ]①液态水汽化 ②将胆矾加热变为白色粉末 ③浓硫酸稀释 ④氯酸钾分解制氧气 ⑤生石灰跟水反应生成熟石灰 A.①② B.②③ C.①④⑤ D.②④ 答案: 答案:D
题型:填空题 根据右图写出相应的单词。1. What is she pointing at? It's Danny's __________.2. May I help you __________ __________ __________? No, thanks! Cameras are __________. 查看答案