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【单选题】
《登金陵凤凰台》中的名句是颈联的
A.
凤凰台上,空自流
B.
花草埋幽径,晋代衣冠成
C.
三山半落青天外,二水中分
D.
总为浮云能蔽日,长安不见使人愁
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参考答案:
举一反三
【判断题】目前看来月球上存在火山。()
A.
正确
B.
错误
【单选题】从水中萃取水溶性生物碱所采用的溶剂是
A.
乙醇    
B.
乙醚    
C.
三氯甲烷  
D.
正丁醇    
E.
【单选题】从水中萃取水溶性生物碱所采用的溶剂是( )
A.
氯仿
B.
正丁醇
C.
乙醚
D.
乙醇
【单选题】从水中萃取水溶性生物碱所采用的溶剂是( )
A.
正丁醇
B.
氯仿
C.
乙醚
D.
乙醇
【简答题】从选项A-L中选择合适的选项填空。 A. aspirin B. twice C. longer D. lives E. importance F. medical G. enough H. hero I. checked J. infectious K. doctors L. diseases World Blood Donor Day Every year on 14 June, people ...
【单选题】Our preliminary estimate of the incubation period distribution provides important evidence to support a 14-day medical observation period or quarantine for exposed persons. [2] Our estimate was based ...
A.
sentence [1]
B.
sentence [2]
C.
sentence [3]
D.
sentence [4]
【简答题】Unknown to most Facebook users, the social network actually offers a lot of privacy controls and security features which can help you lock your account, so you can speak freely. If it’s used properly,...
【单选题】从水中萃取水溶性生物碱所采用的溶剂是( )
A.
乙醇
B.
乙醚
C.
氯仿
D.
正丁醇
【单选题】Use of the illegal drag named Ecstasy (MDMA) has increased alarmingly in Britain over the last few years, and in 1992 the British Medical Journal claimed that at least seven deaths and many severe adv...
A.
drugs change the way the body reacts
B.
the British Medical Journal has reported seven deaths caused by Ecstasy
C.
Ecstasy alone was responsible for the 14 deaths in Britain
D.
Ecstasy causes changes to the body
【单选题】从水中萃取水溶性生物碱所采用的溶剂是
A.
乙醇
B.
乙醚
C.
正丁醇
D.
三氯甲烷
E.
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