【单选题】【消耗次数：1】
安全泄压装置是在气瓶超压、超温时迅速泄放气体、降低压力的装置。气瓶的安全泄压装置应根据盛装介质、使用条件等进行选择安装。下列安全泄压装置中，车用压缩天然气气瓶应当选装的是（）。
①
A.易熔合金塞装置
②
B.爆破片-易熔合金塞复合装置
③
C.爆破片装置
④
D.爆破片-安全阀复合装置
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【多选题】
生产系统内一旦发生爆炸或压力骤增时，可能通过防爆泄压装置将超高压力释放出去，以减少巨大压力对设备、系统的破坏或者减少事故损失。防爆泄压装置主要有（ ）。
①
A.单向阀
②
B.安全阀
③
C.防爆门
④
D.爆破片
⑤
E.防爆窗
【单选题】
安全保护装置是通过自身结构功能限制或防止机器某种危险，从而消除或减小风险的装置。常见种类包括联锁装置、能动装置、敏感保护装置、双手操作式装置限制装置等。关于安全保护装置功能的说法，正确的是（）。
①
A.联锁装置是防止危险机器功能在特定条件下停机的装置
②
B.限制装置是防止机器或危险机器状态超过设计限度的装置
③
C.能动装置是与停机控制一起使用的附加手动操纵装置
④
D.敏感保护装置是探测周边敏感环境并发出信号的装置
随机题目
【单选题】
At this stage we cannot tell you____ you have been selected for the job or not.
①
unless
②
although
③
whenever
④
whether
【单选题】
Our factory has ____ for years.
①
many fire equipments
②
much equipment of fire
③
many equipments of fire
④
much fire equipment
【单选题】
The city ____ its birth-rate by almost 60% in the past 20 years.
①
cuts
②
has been cut
③
cut
④
has cut
【单选题】
?There are altogether fifty students in our class, twenty____ are boys. ?
①
of them ?
②
of those ?
③
of whom ?
④
of whose ?
【单选题】
They have built a____.?
①
bridge hundred meters ?
②
bridge a hundred meters long?
③
a hundred meters long bridge ?
④
bridge hundred meters long?
【单选题】
—You’ve given us a wonderful Chinese dinner, Mrs Huang.—____.
①
Oh, I’m afraid I didn’t cook well
②
I’m glad you enjoyed it
③
It’s not necessary for you to say so
④
It doesn’t matter
【单选题】
2. Everyone of them ____ tired and wanted a good rest.
①
seems
②
is seemed
③
was seemed
④
seemed
【单选题】
10. I am not a violent man ____, but these insults were more than I could bear.
①
by birth
②
with birth
③
by nature
④
with nature
【单选题】
The old woman can’t ____ the way to the post office.
①
find out
②
find
③
look for
④
look