规范的实验操作是实验成功的关键之一. (1) 用容积为30mL的试管加热某种液体时,试管中液体的体积不超过 mL, (2) 取用块状固体时可用(填仪器名称)夹取,取下试剂瓶盖放(填“正”或“倒”)在桌面上. (3) 洗干净的试管,可看到试管壁上的水既不,也不. 答案:【1】10
【1】镊子【2】倒
【1】聚成水滴【2】成股流下 It has been a long time for human to make _____ to reach the moon. A. its easy B. it’s possible C. it truth D. it possible