皮皮学，免费搜题
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【单选题】
摩尔吸光系数很大,则说明 1A.
该物质的浓度很大
B.
光通过该物质溶液的光程长
C.
该物质对某波长光的吸收能力强
D.
测定该物质的方法的灵敏度低
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皮皮学刷刷变学霸
举一反三
【单选题】Excuse me, where __________? Do you know? Yes, I know where ________.
A.
Jim lives; he lives
B.
does Jim live; does he live
C.
Jim lives; does he live
D.
does Jim live; he lives
【单选题】How many portable GMDSS VHF transceivers must a passenger ship be provided with?
A.
1．
B.
2．
C.
3．
D.
4．
【单选题】How many GMDSS radio operators are needed/required on board according to the provisions of the International Convention for the Safety of Life at Sea,1974?
A.
2 operators
B.
1 operator
C.
4 operators
D.
3 operators
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