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【单选题】
压缩天然气（CNG）的主要成分是（）。A.
甲烷
B.
乙烷
C.
丙烷
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举一反三
【简答题】检验检疫机构对注册饲养场实施 。发现重大动物疫情时，须立即采取紧急预防措施，并于 小时向国家质检总局报告。
【单选题】What did the Witch advise Digory to do with the silvery apple?
A.
To give the apple to her.
B.
To ogive the apple to his mother.
C.
To give the apple to Uncle Andrew.
【单选题】When Polly and Digory stood still in the courtyard, what did they hear?
A.
A "tick-tock" sound.
B.
Their heartbeats.
C.
A birdcall.
【简答题】What did the author say about her own writing expeIn this age of Internet chat, videos and reality television, there is no shortage of mindless activities to keep a child occupied. Yet, despite th...
【单选题】下列有关除去热原方法的叙述,错误的为( )
A.
250℃,30mm以上干热灭菌能破坏热原活性
B.
重铬酸钾-硫酸清洁液浸泡能破坏热原活性
C.
在浓配液中加入0.1%-0.5%(g/mL)的活性炭除去热原
D.
热原是大分子复合物,0.22m微孔滤膜可除去热原
E.
离子交换树脂可除去热原
【单选题】Why did Uncle Andrew sidle up to Digory?
A.
Because he wanted to kill Digory.
B.
Because he wanted to steal Digory's rings.
C.
Because he wanted to criticize Digory.
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