【多选题】【消耗次数：1】
电石起火时必须用( )灭火。
①
干砂灭火器
②
泡沫灭火器
③
二氧化碳灭火器
④
四氯化碳灭火器
⑤
取水喷洒
参考答案：
复制
纠错
相关题目
【单选题】
泡沫灭火器是常用的灭火器，它适用于( )。
①
适用于扑灭木材、棉麻等固体物质类火灾
②
适用于扑灭石油等液体类火灾
③
适用于扑灭木材、棉麻等固体物质类和石油等液体类火灾
④
适用于扑灭所有物质类火灾
【单选题】
泡沫灭火器是常用的灭火器，它适用于（ ）。
①
适用于扑灭石油等液体类火灾
②
适用于扑灭木材、棉麻等固体物质类和石油等液体类火灾
③
适用于扑灭木材、棉麻等固体物质类火灾
④
适用于扑灭所有物质类火灾
【判断题】
二氧化碳灭火器是利用其内部充装的液态二氧化碳的蒸气压将二氧化碳喷出灭火的一种灭火器具，其通过降低氧气含量，造成燃烧区窒息而灭火，一般能造成燃烧中止的氧气含量应低于12%。
①
正确
②
错误
【单选题】
灭火器的正确使用步骤是（ ）。①提起灭火器，把灭火器罐上下晃动三次以上
②拔去保险销
③手握灭火器橡胶喷嘴，对向火焰根部
④将灭火器上部手柄压下，灭火剂喷出
⑤对准火焰喷扫
⑥熄灭后以水冷却除烟以防止复燃
①
②③④⑤
②
②③④⑤⑥
③
C①②③④⑤
④
D ①②③④⑤⑥
随机题目
【单选题】
If we say some food is ____, we mean it is safe to eat.
①
ideal
②
editable
③
ideate
④
edible
【单选题】
Most people came to realize that it was about time the government ____ further measures to control the population.
①
must take
②
is taking
③
takes
④
took
【单选题】
He always has a lot of _______ ideas in his mind , and sometimes we do not even know what he is thinking about.
①
novel
②
spoil
③
acceptable
④
additional
【单选题】
Her skin was dry after ____ to the wind during the trip.
①
failure
②
disclosure
③
exposure
④
pressure
【单选题】
Though ____ in a big city, Peter always prefers to paint the primitive scenes of country life.
①
grown
②
raised
③
tended
④
cultivated
【单选题】
The medicine is on sale everywhere. You can get it at ______ chemist’s.
①
each
②
some
③
certain
④
any
【单选题】
The computer has brought about surprising technological changes ____ we organize and produce information.
①
in a way
②
in the way
③
in that way
④
in no way
【单选题】
When Mr. Jones gets old, he will ____ his business to his son.
①
take over
②
hand over
③
think over
④
get over
【单选题】
The ____ of Liberty was dedicated on an island in Upper New York Bay in 1886.
①
Status
②
Statue
③
Stature
④
State
【单选题】
John _______ to be a polite man. But in fact he is very rude.
①
pretends
②
assures
③
affords
④
melts