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【简答题】
13、漏电断路器是一种高灵敏的控制 电器,它与空气开关组装在一起,具 有 、 _ _ 、 _ _ 、 _ _ 等保护功能。
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【单选题】Some children have never seen a dentist before starting school.
A.
Right
B.
Wrong
C.
Not mentioned
【简答题】听音判断，对的打“√”，错的打“×”。 1. 2. 3. ( ) ( ) ( )
【单选题】Before starting any diesel or gasoline engine, which of the following must be checked?____.
A.
Oil level
B.
Flow of cooling water
C.
Exhaust discharge
D.
All of the above
【简答题】听音，对的打“√”，错的打“×”。 1. 2. 3. 4. ( ) ( ) ( ) ( )
【简答题】情景会话。情景适当的图打“√”，否则打“×”。 ( ) 1. ( ) 2. ( ) 3.
【单选题】Before starting a gasoline engine on a motorboat，you should make sure for safety that ______．
A.
The gasoline tank is full
B.
The bilges，cabins，etc．are thoroughly ventilated
C.
You have fresh water on board
D.
Each of the above is followed
【单选题】Before starting an air compressor, It should be _____.
A.
unloaded
B.
primed
C.
filled with water
D.
greased
【简答题】听音，判断正误，对的打“√”，错的打“×”。 1. 2. 3. ( ) ( ) ( )
【简答题】听音，判断正确打“√”，错的打“×”。 1. 2. 3. 4. ( ) ( ) ( ) ( )
【单选题】Before starting, the cylinders and pistons must be warmed up ( ).
A.
quickly
B.
usual
C.
gradually
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