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【单选题】
要使 10g 椰子油完全皂,需要加入( ) 氢氧化钠。( 椰子油的皂化值取 257)A.
1.84
B.
3.6
C.
2.57
D.
25.7
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【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】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
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