自给()式空气呼吸器的主要部件有:气瓶、气瓶阀(爆破片)、带有系带的背架、减压器(一级)、供气阀(二级)、全面罩、安全装置等.
A.正压
B.负压
C.表压
D.绝压
参考答案:A
Do you like playing __小题1:_(不同的)kinds of balls? Are you interested in collecting balls. I have a__小题2:__(特别的)room in my house, which is _小题3:_(满) of all kinds of balls. I have been collecting them__小题4:__(从...以来)I was seven years old. Now I have got __小题5:__(千)of them. I have run out of room to __小题6:__(贮存)them. They are all __小题7:__(围绕着)our house. By the way, I’d like to __小题8:__(创建)a Ball Collectors’ __小题9:__(俱乐部), and __小题10:__(欢迎) to join us. Click here to know more! Click here to join us now.
阳盛血热型月经先期首选:
A.解毒四物汤B.保阴煎C.二至丸D.两地汤E.清经散