材料:
It is not recommended that any person shall be allowed on the bridge or in the pilot house except the pilot and other representative of the canal,and master and such officers and other members of the crew of the vessel as may be necessary for its navigation and control,management,operation and safety.
Navigational aids are difficult to maintain and are reported to be unreliable in this waters.A considerable amount of shipping uses the canal and,in addition,many local fishing craft with nets may be encountered in the area. Since passage through the canal entails a run of more than 250 miles,long periods of considerable vigilance are necessary in order to maintain safe standards of navigation.
问题:
PILOT HOUSE is referred to ________ in this passage.
The author implies that ________.
The person on the bridge or in the pilot house shall be those ________.
SHIPPING is referred ________ in this passage.
材料:
It is not recommended that any person shall be allowed on the bridge or in the pilot house except the pilot and other representative of the canal,and master and such officers and other members of the crew of the vessel as may be necessary for its navigation and control,management,operation and safety.
Navigational aids are difficult to maintain and are reported to be unreliable in this waters.A considerable amount of shipping uses the canal and,in addition,many local fishing craft with nets may be encountered in the area. Since passage through the canal entails a run of more than 250 miles,long periods of considerable vigilance are necessary in order to maintain safe standards of navigation.
问题:
PILOT HOUSE is referred to ________ in this passage.
The real reason that caused the hydraulic steering system to fail was that ________.
The time that the thruster drive unit failed was ________ hrs.
When the hydraulic steering system failed,________.
材料:
According to the passage,________.
It can be concluded that ________.
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