题目

Mrs Brown is very fat (胖). “Don’t eat meat or cakes,”her doctor says to her. “I’m going to stop her eating them, doctor,”her husband (丈夫) says. The next morning, Mrs Brown makes a nice cake, and her husband eats half of it. After he goes out, Mrs Brown cuts (切) a very small piece of the cake and eats it. It is very good. She cuts a bigger piece and eats it. In a few minutes she finishes the cake.“My husband is going to be very angry (生气),”she says.“What am I going to do?” She makes another cake very quickly, eats half of that, and leaves half on the table9．图1是实验室制取气体的一些装置，据图回答有关问题．（1）写出指定仪器的名称：①试管；②集气瓶；（2）写出以高锰酸钾为原料制氧气的符号表达式2KMnO4$\frac{\underline{\;\;△\;\;}}{\;}$K2MnO4+MnO2+O2↑，应选用的发生装置是C（填字母），该装置中试管口应略向下倾斜，原因是防止冷凝水回流，使试管炸裂应选用的收集装置是D或E（填字母），若选用排气法收集氧气时应如何验满用带火星的木条靠近集气瓶口，若木条复燃，则氧气已满．（3）实验室在常温下用块状电石与水反应制取微溶于水的乙炔气体，该反应必须严格控制加水速度，以免剧烈反应放热引起发生装置炸裂．你认为上图中最适合制取乙炔气体的发生装置是A；（4）如图2所示的装置，有多种功能，下列关于该装置用途的说法正确的是DA．用排水法收集难溶于水的气体，瓶中装满水，气体从a管进入B．用于病人输氧时，瓶中装部分水，b管连接供氧钢瓶C．测量难溶于水的气体体积时，瓶中装满水，气体从a管进入，b管连接量筒D．用排空气法收集密度小于空气的气体时，气体从b管进入．