阻止空气进入燃烧区或用惰性气体稀释空气,使燃烧因得不到足够的氧气而熄灭的灭火方法是()。
A、窒息灭火法
B、冷却灭火法
C、隔离灭火法
D、化学抑制灭火法
参考答案:A
根据所给的汉语提示,用合适的单词填空。
小题1:---Do you know Hong Kong? ---Yes,it ____________ (回归)to China in 1997.
小题2:Lucy and Tom have been in love for many years and they’ll get ____________(结婚的)next month.
小题3:They all think it’s____________ (不可能的)to finish the work in such a short time.
小题4:How to protect the ________________(环境)has been under discussion.
小题5:The fans _______(鼓掌)and screamed when the famous singer appeared on the stage.
关于胸膜腔负压生理意义错误的是()
A.保持肺的扩张状态
B.有利于静脉回流
C.维持正常肺通气
D.使中心静脉压升高
E.胸膜腔负压小时可导致肺塌陷