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以下是化学实验室里几种常用的实验装置，请回答： （1）请写出图中a、b的仪器名称:a ，b 。 （2）实验室制取气体选择收集方法时，下列性质：①颜色；②密度；③溶解性；④可燃性；⑤能否与水反应，必须考虑的是 。 （3）分别用A、B两种不同的发生装置和不同的药品都可以制取氧气，制取气体时使用B 装置比使用A装置的一个优点是： 。若用高锰酸 钾制氧气，A装置中的试管口放一团 ， （4）用D装置收集氧气时，检验是否集满的是 。 （5）在常温下，用亚硫酸钠固体和稀硫酸制取二氧化硫气体，二氧化硫是易溶于水、密度 比空气大的有刺激性气味的气体，用的发生装置是 ；收集装置是 。
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