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【单选题】
which bird is regarded as the national bird of America?A.
egret
B.
the bald eagle
C.
swan
D.
swallow
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【简答题】To criticise past actions:
【简答题】If you hang back, and reserve and criticise at first, you are pring yourself from getting the fullest possible value from what you read.
【单选题】What is the purpose of the article?
A.
to criticise people who always conform
B.
to encourage people to be individuals
C.
to examine the reasons for eccentric behaviour
D.
to describe problems faced by eccentric people
【单选题】A negative side of the Obama effect is that______.
A.
more people have started to criticise President Obama's racial policies
B.
relations between whites and African Americana may become tense again
C.
people are now less ready to support policies addressing racial inequality
D.
white people are likely to become more critical of African Americans
【单选题】功率混合气时，发动机输出功率最大，功率混合气的过量空气系数是( )：
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