Illumination by flood lights
A quick flashing red light at each lower corner
A strobe light visible both up and downstream
Fixed amber lights under the extreme outer edges of the traveller
第1题：
There is no bridge over the river， we have to cross it by _b__________．
第2题：
A.The，a
B.A，/
C.A，the
D.An，the
第3题：
A、space
B、distance
C、room
D、gap
第4题：
34．—It’s difficult for the village children to cross the river for school．
— I think a bridge ___________over the river．
A． was built
B． is being built
C． has been built
D． should be built
第5题：
The bridge should inform the engine room______before passing through congested or shallow waterway.
A.24 hours
B.2 hours
C.1 hour
D.15 minutes
第6题：
—Why don’t we choose that road to save time ?
—The bridge to it __________ .
A. has repaired B. is repaired
C. is being repaired D. will be repaired
第7题：
Eventually, they gave up the project to build a bridge over the river because of the _______ high costs it would involve.
A：excessively
B：expensively
C：effectively
D：efficiently
第8题：
A. come over
B. being come to
C. being come over
D. came over
第9题：
If anything abnormal be found on the load change of main engine when the ship is entering in shallow waterway, before taking measures the engineer on duty should _______.
A.stop main engine immediately
B.ask the captain and the chief engineer's permission for stopping the engine
C.inquire the bridge for the situation initiatively
D.stop engine and inform bridge
第10题：