A.detachable link
B.stud link
C.Kenter link
D.connection link
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A.flame stopper
B.flame screen
C.flame filter
D.flame restrictor
A.enlarge bit
B.casing bit
C.hole opener
D.casing opener
A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground
A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water
A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
最新試題
Fog is likely to occur when there is little difference between the dew point and the（）.
When the wave period and the apparent rolling period are the same（）.
The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
What is it called when it is possible to ignite the vapour above the oil?（）
Which wind results from a land mass cooling more quickly at night than an adjacent water area?（）
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
In the Northern hemisphere northerly winds may cause temperature（）.
Manoeuvring information can not be obtained from（）.
（）is halfway between the forward and after perpendiculars and is reference point for vessel construction.