写出图中编号仪器的名称：

①____，②____，③____，④____．

某同学用高锰酸钾制取氧气，选择了A装置，实验结束时发现水槽中的水变成了浅紫红色，你认为产生该现象的原因可能是____．实验室用氯酸钾制取氧气，要收集一瓶比较纯净的氧气，收集装置选____（填序号，下同），若要收集一瓶比较干燥的氧气，收集装置____，写出该反应的符号表达式____．已知实验室可用加热无水醋酸钠和碱石灰的固体混合物来制取甲烷．发生装置选____．用E装置收集气体时，当导管口出现____时，才开始收集；当观察到____时，说明气体已经收满了．

    How would you use a radio or a telephone if you had no electricity or batteries? This 1 bothered (使烦恼) British inventor Trevor Baylis. So in 1996, he 2 a wind-up (装有发条的) radio. It doesn't need any 3 or batteries. You wind it up by hand. It plays for about an hour. Then, you wind it up 4, and it plays for another hour. Today it's made in South Africa.

    Then in 1999, Baylis invented a mobile telephone that is powered by 5.The shoes have a small battery that is powered when you 6. This battery is connected to a mobile phone.

    These two simple inventions can bring 7 communications to all parts of the world. Baylis doesn't have a university degree in engineering. In 8, he left high school before graduating. He just loves 9 things to help people. He never knows when 10 will come to him. The idea for the telephone came to him in a dream.