The patient was in bad need of operation but there was no guarantee(保证) that she would survive the anaesthetic (麻醉剂), which made the doctors on the horn of a __________.
A.
process
B.
arrangement
C.
ceremony
D.
dilemma
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皮皮学刷刷变学霸
举一反三
【简答题】(2)已知反应 ,在450K时,p e (Br 2 )=0.680kPa,在550K时p e (Br 2 )=68.0kPa。向一个2.00L容器中引入0.500mol的CuBr 2 (s),求加热至600K时,CuBr 2 (s)的分解率。