【判断题】【消耗次数：1】
电焊机应设置二次空载降压保护装置
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【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】
Although she wrote a lot of short stories and poems when she was very young, ____ she was twenty five.
①
her first real success did not come until
②
her real first success came until not
③
since her first real success did not come until
④
not until her first real success
【单选题】
You’ d better find some information about Nike’s“Chamber
of Fear” advertisement, _____?
①
wouldn’ t you
②
had you
③
hadn’ t you
④
should you
【单选题】
There is a real possibility that these animals could be frightened, ______ a sudden loud noise.
①
being there
②
should there be
③
there was
④
there have been
【单选题】
Of the six people in the plane when it crashed, only one _____ . Everyone else died.
①
emerged
②
survived
③
existed
④
escaped
【单选题】
It was_____ back home after the experiment.
①
not until midnight did he go
②
until midnight that he didn’ t go
③
not until midnight that he went
④
until midnight when he didn’ t go
【单选题】
The truck driver was fined for exceeding the speed
____.
①
range
②
limit
③
rule
④
regulation
【单选题】
America will never again have as a nation the spirit of
adventure as it ____ before the West was settled.
①
could
②
did
③
would
④
was
【单选题】
The ____ problem of bring a spaceship back from the moon has been solved.
①
technical
②
technological
③
technique
④
technology