单项选择题
The securing of passenger cars on a Ro-Ro vessel requires（）.
A.simple and lightweight equipment
B.low labor intensive equipment
C.specially designed equipment to avoid vehicle damage
D.All of the above
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The safety of the port should（）in respect of a vessel properly manned and equipped，and navigated and handled without negligence and in accordance with good seamanship.
A.be watched
B.be seen
C.be viewed
D.be inspected -
单项选择题
The primary danger in helicopter fires is（）.
A.burning jet fuel running on to quarters or other areas
B.loss of stability
C.rotating and flying debri
D.heat damage to helicopter structure -
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The premium is usually included in（）.
A.the indemnity
B.the franchise
C.the freight rate
D.the cargo cost
