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【单选题】
氮气制备的方法是（）A.
将硝酸铵NH4NO3加热
B.
将亚硝酸胺 NH4NO2 加热
C.
将氯气和氨气混合
D.
B 和 C
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举一反三
【单选题】Madame Butterfly is an opera composed in 1904 by _____ operatic composer Giacomo Puccini.
A.
British
B.
Chinese American
C.
Italian
D.
Canadian
【单选题】听力原文：W: Do you want to come with me to the opera tonight? I've got extra tickets and I think it will take your mind off that math problem that you were sweating over for the last two hours. M: That'll...
A.
He doesn't want to go to the opera tonight.
B.
He has a chance to have a break from the math problem.
C.
He wants to improve his math grade by watching operas.
D.
He'll meet the woman when he has finished the math problem.
【单选题】According to Peter, he watched an opera in ______.
A.
Italian
B.
German
C.
Taiwanese
D.
French
【单选题】患儿男,1岁,咳嗽流涕一天,夜起发热入院.体温39.5°C,神志清楚。操作中的注意事项,不正确的是
A.
冷疗时间应30～40分钟
B.
腋窝、腹股沟等处适当延长用冷时间
C.
冷疗后30分钟复测体温并记录
D.
胸前区、腹部和足底等处禁用冷疗
E.
随时观察患儿情况
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