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【单选题】
下列关于热原的叙述正确的是( )
A.
180℃3-4 h可以彻底破坏热原
B.
热原大小在300-500 nm之间,可以被微膜截留
C.
热原能溶于水,超滤装置也不能将其除去
D.
活性炭可以吸附色素与杂质,但不能吸附热原
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【判断题】平邑一区的担架队于1942年9月初组建,有354名民工,68副担架。这个担架队先后参加了宿北、鲁南、莱芜等著名战役,胜利的完成支前救护任务,受到上级多次通令嘉奖。()
A.
正确
B.
错误
【单选题】The adage, "There is no such thing as a free lunch," is used to illustrate the principle that
A.
goods are scarce.
B.
people face tradeoffs.
C.
income must be earned.
D.
households face many decisions.
【单选题】They have made up his mind to give up smoking.
A.
tried
B.
attempted
C.
agreed
D.
decided
【简答题】Translating into Chinese. Economic and Monetary Union The birth of the euro resulted in fixed exchange rates between all EMU member countries. In deciding to form a monetary union, however, EMU count...
【简答题】Theyagreed to give the matter top ______(priority/prior).
【简答题】Fill in the blanks with the words or expression given in the box. Change the form where necessary. He ____________ some of his old photos in an old book. They agreed to give the matter top ___________...
【简答题】用所给单词的适当形式填空。 He can stay there for ten hours without __ (move). She was ill and had to (go) to a doctor. [ You shouldn’t always think about ____ (you). We expect ____ (visit) the Great Wall one day. ...
【判断题】交流负反馈有四种基本组态:电压串联负反电 馈 、电压并联负反馈、电流串联负反馈、电流并联负反馈。
A.
正确
B.
错误
【单选题】The adage, "There is no such thing as a free lunch," means
A.
even people on welfare have to pay for food.
B.
the cost of living is always increasing.
C.
people face tradeoffs.
D.
all costs are included in the price of a product.
【单选题】Rather than doing this via auction or through private art dealers they can give them to the government, which buys them at an agreed price ______ them
A.
after having, independently valued
B.
after having, independently valuable
C.
by having, independently valueless
D.
by having, independently value
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