低压电器灭弧室作用是熄灭触点电弧，防止烧伤触点及引起电器爆炸。
参考答案：对
--- What it be?
--- It be a man, for it is not moving. It be a dustbin, I think.
A．can, may, must
B．can, can’t, must
C．can, must, can
D．may, may not, could
属于TCRγ链可变区的编码基因是
A．D基因
B．Cδ基因
C．J基因
D．Cγ基因
E．Cμ基因
