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【判断题】
网壳结构的节点和杆件制作精度比网架低A.
正确
B.
错误
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【单选题】which of the following ships may not complying with the SOLAS Convention?
A.
Passenger ships sailing on international waters but less than 300 tons
B.
Passenger ships sailing on international waters
C.
Cargo ships of 300 gross tonnage and upwards
D.
Cargo ships less than 300 gross tonnage
【单选题】Some ships have special duties, such as（）（驳船）.
A.
liquid cargo ships
B.
general cargo ships
C.
barges
D.
tugs
【单选题】Ships with priority inspection for PSCO do not include_______.
A.
ships visiting the port for the first time
B.
vulnerable types of ships
C.
ships with previous records of detention
D.
ships with satisfied data records
【单选题】甲醛、丁醛、丙酮、苯乙酮亲核加成反应活性次序是( )
A.
甲醛>丁醛>丙酮>苯乙酮
B.
甲醛>丙酮>苯乙酮>丁醛
C.
丙酮>苯乙酮>甲醛>丁醛
D.
甲醛>丁醛>苯乙酮>丙酮
【单选题】What kinds of ships may not comply with SOLAS convention?
A.
Cargo ships less than 300 tons
B.
Cargo ships more than 300 tons
C.
Passenger ships sail on international service
D.
B&C
【简答题】2-42 十六进制数AB.CH对应的十进制数字是__________。
【单选题】LNG and LPG ships ___.
A.
are obsolete
B.
cannot compete with container ships
C.
often operate on long-term contracts
D.
All of the above
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