unsafe
safe
good
bad
第1题：
Many navigational warnings are of a temporary nature，but others remain in force for several months or may be succeeded by ______.
A.Notices to Mariners
B.Sailing Directions
C.List of Lights and Signals
D.Guide to Port Entries
第2题：
In the Northern Hemisphere you are caught in the dangerous semicircle of a storm with plenty of sea room available. The best course of action is to bring the wind on the ______.
A.port quarter and make as much headway as possible
B.starboard quarter and make as much headway as possible
C.starboard bow and make as much headway as possible
D.port bow and make as much headway as possible
第3题：
The quality inspector ____ finished products carefully to make sure each was in good condition.
A. looked over
B. found out
C. held up
D. stuck to
第4题：
We should make tug fast on （） .
第5题：
第6题：
A port ______ if more than ordinary prudence and skill is needed to avoid exposure to danger there．
A.safety
B.is safe
C.is not safe
D.is not safety
第7题：
If a sailing vessel with the wind on the port side sees a sailing vessel to windward and cannot tell weather the other vessel has the wind on the port or starboard side, she shall ______.
A.hold course and speed
B.sound the danger signal
C.keep out of the way of the other vessel
D.turn to port and come into the wind
第8题：
A、ensure
B、assure
C、insure
D、make sure
第9题：
在右后挽牢拖轮！（）
第10题：
While troubleshooting a connectivity problem, a network administrator notices that a port status LED on a Cisco Catalyst series switch is alternating green and amber. Which condition could this indicate?（）