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【简答题】
某精馏塔的馏出液量是50kmol/h,回流比是2,则精馏段的回流量是 kmol/h。
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举一反三
【单选题】How did 'improvisation' come into being?
A.
The blues singers gathered to have contests.
B.
New words were added into old songs.
C.
New styles were played with guitars.
D.
The blues singers created music while playing.
【单选题】"But the blues did occasionally afflict all the adults." Which one is its best paraphrase?
A.
But the blue color did occasionally impress all the adults.
B.
But the blues music did occasionally impress all the adults.
C.
But sadness did occasionally come to all the adults.
D.
But sadness did occasionally make all the adults feel painful.
【单选题】But the blues did occasionally afflict all the adults.
A.
feeling of deep sadness
B.
the color of the sky
C.
sad; depressed
【单选题】Blues Starting my own section of blues recommendations fills me with a creeping sense of guilt andcomplicity．Why?Because Im a white guy writing about an almost completely black genreblack，at least in ...
A.
the whites
B.
the blacks
C.
the Europeans
D.
the African people
【简答题】Where did the blues first develop?
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