三乙基铝是()物质,若纯三乙基铝化合物或高浓度化合物与空气或水接触可发生燃烧,通常燃烧伴有响亮的爆炸声。
A、可燃性
B、易燃性
C、自燃性
D、稳定性
参考答案:B
小题1:Louisa didn’t have a pencil,so I let her borrow (我的).
小题2:If everyone (遵守) the traffic rules, there will be fewer accidents.
小题3:I don’t know what her interests are, because we talk (主要地)about work when we meet.
小题4:If you want to improve your English, you should try to practise (说) English as much as possible in and out of class.
小题5:To our great (惊讶), Tom failed to pass the graduation exam.
小题6: (除了……之外) Su Dongpo, Huanggang was home to ancient doctor Li Shizhen and printing inventor Bi Sheng.
井下防爆型的通信,信号和控制装置,应优先采用()。
A、增安型
B、隔爆型
C、特殊型
D、本质安全型