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【单选题】
船舶载运危险货物的应急措施应依据下列哪些因素而有所不同？Ⅰ．船舶所处的地理位置，如港内或港外 Ⅱ．危险货物所处的位置，如舱面或舱内 Ⅲ．危险物质的状态，如气态、液态或固态 Ⅳ．危险物质的特性，如易燃液体的A.
Ⅰ～Ⅳ
B.
Ⅱ～Ⅳ
C.
Ⅰ～Ⅲ
D.
Ⅰ、Ⅱ 、Ⅳ
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举一反三
【单选题】American consumers like convenience very much. During the last 50 years, there has been a dramatic increase in such labor-saving devices as automatic washing machines, clothes dryers, dishwashers, foo...
A.
a shortage of labor force in America
B.
people's need to reduce the time spent on housework
C.
Americans' interest in doing housework
D.
the quick change of American family life
【单选题】She hasn't written to me ______.
A.
for last year
B.
during last year
C.
since last year
D.
until a year ago
【简答题】During the last six months， there was a boom of sea creature in California and whalesare not the only ones. 查看材料
【单选题】My life has changed a lot during the ____________ years.
A.
last a few
B.
last few
C.
a few last
D.
few last
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