下图是某同学设计的储气装置(固定装置已略去)。下列说法中不正确的是( )
| A．打开止水夹a、b,气体从d管导入,储存在下面的集气瓶里 |
| B．取用储存在下面集气瓶里的气体时,通过控制止水夹a、b,可将气体顺利排出 |
| C．气体被储存在下面的集气瓶里时,c导管也必须安装止水夹 |
| D．该装置也可作为制取二氧化碳气体的发生装置 |
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