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【单选题】
某悬浮液，其颗粒浓度为50kg/m3悬浮液，颗粒的密度为2000kg/m3。若滤饼的含水率为0.4（质量分数），则过滤该悬浮液，获得1m3滤液时可得滤饼体积为（）A.
0.0487
B.
0.0533
C.
0.0619
D.
0.0734
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举一反三
【单选题】Sir Barnes Wallis, the British aeronautical engineer who helped to develop the Concorde supersonic airliner and the swing-wing aircraft, failed his London matriculation examination at the age of 16.
A.
judicial
B.
mathematics
C.
admission
D.
expertise
【简答题】A．dumb B．establish C．debt D．doubtful
【简答题】A．positive B．negative C．cheerful D．doubtful
【单选题】Why did Miss Barnes refuse the man's final offer?
A.
She feels her value wasn't appreciated.
B.
She wants a more interesting job.
C.
She's tired of working.
D.
She wants more money.
【单选题】Castilla y León es la mayor Comunidad de España por_____?
A.
Superficie
B.
Condición geográfica
C.
Variedad de paisajes
D.
Número de viajeros
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