题目

下图是实验室制取二氧化碳并验证其性质的的实验装置图，试根据要求回答下列问题：（1）装置C中观察到的现象是_______________，反应表达式是___________________。（2）装置D中观察到蜡烛___________，说明_______________、_________________，由此可知，二氧化碳的用途之一可用于__________。（3）用装置E来收集二氧化碳时，二氧化碳应从______（填“c端”或“d端”，下同）通入。若E装置事先装满水，用来收集氧气时，气体应从__________通入。连线。Problem Advice①She is tired. A. She should visit the dentist.②She feels dizzy. B. She should go to bed early.③She has a toothache. C. She should sit down.④She saw an accident. D. She should ask the teacher⑤She didn't understand the lesson. E. She should call the police