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【判断题】
减数分裂中染色单体的交换和细胞学上观察到的交叉现象是同时发生的。A.
正确
B.
错误
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举一反三
【单选题】The word 'discharge' as used in Pollution Prevention 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】In an oil cooler circulated by sea water, the oil is at a larger pressure, the result being that any leak in the cooler will mean a loss of _____.
A.
oil
B.
sea water
C.
refrigerant
D.
fresh water
【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.
Master’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.
Master'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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