皮皮学，免费搜题
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【多选题】
由苯制备间三溴苯时,需要经历下面哪些反应?A.
硝化
B.
还原
C.
取代
D.
重氮化
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皮皮学刷刷变学霸
举一反三
【单选题】RESULT OF SEARCH NEGATIVE means ______.
A.
the search has found nothing
B.
the derelict has been found
C.
the derelict has been located
D.
the derelict has been sighted
【单选题】Unlit derelict vessel adrift in vicinity of North Rocky Island at 0250 hours local time
A.
Dangerous wreck is reported to be in vicinity of North Rockly Island
B.
Unlit derelict vessel is reported to be in vicinity of North Rockly Island
C.
Leaking pipeline is reported to be in vicinity of North Rockly Island
D.
Hazardous mine is reported to be in vicinity of North Rockly Island
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