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【单选题】
异步电动机处于理想空载状态时，转差率为（）。A.
s=0
B.
s=1
C.
0＜s＜1
D.
s＜0
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举一反三
【单选题】In which case is the oil discharge permitted?
A.
For new tankers 1/30,000 of the cargo oil can be discharged into the sea.
B.
Oil is allowed to be discharged from the machinery space in port.
C.
Oil may be discharged within 12 miles from land.
D.
Oil content in the discharged mixture must be less than 150 ppm.
【单选题】The word 'discharge' as used in Pollution Prion Regulations applies to oil _____.
A.
leaked into navigable waters
B.
poured into navigable waters
C.
pumped into navigable waters through a fixed piping system
D.
all of the above
【单选题】Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited ________．
A.
It is required on all vessels
B.
It may be located in a conspicuous place in the wheelhouse
C.
It may be located at the bilge and ballast pump control station
D.
All of the above
【单选题】Oil Pollution Regulations require any transfer or discharge of oil or oily mixtures to be recorded in the （）
A.
bridge log
B.
’s log
C.
engine room log
D.
oil record book
【单选题】Oil Pollution Regulations require any transfer or discharge of oil or oily mixtures to be recorded in the ____.
A.
bridge log
B.
oil record book
C.
's log
D.
engine room log
【单选题】On my way to school, I saw people _________advertisements and sample products.
A.
convey
B.
creating
C.
discarding
D.
distributing
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