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【单选题】
某人红细胞与A型及B型标准血清都无凝集反应,其血型是:A.
A型
B.
B型
C.
AB型
D.
Ｏ型
E.
Rh型
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举一反三
【单选题】— I’m terribly sorry. I’m late because …. — That’s OK. You are here and that’s what _____.
A.
does
B.
works
C.
functions
D.
counts
【单选题】-I'm sorry I'm late again But I…． -It's 'no use_______. It's the third time that You came late this week
A.
complain
B.
complained
C.
to complain
D.
complaining
【简答题】Listen to the record and choose the best answer.
【简答题】图示两个结构相同相互串联的液压缸,无杆腔的面积 A 1 = 100cm 2 ,有杆腔面积 A 2 = 80cm 2 ,缸 1 输入压力 p 1 = 9 × 10 5 Pa ,输入流量 q 1 = 12L/min ,不计损失和泄漏,求: 1) 两缸承受相同负载时 ( F 1 = F 2 ) ,该负载的数值及两缸的运动速度; 2) 缸 2 的输入压力是缸 1 的一半时 ( p 2 = p 1 / 2)...
【简答题】Listen to the record and choose the best answer.
【单选题】----I’m sorry. I’m late for the music presentation. --- Why are you so late? The presentation _______ for 10 minutes.
A.
has begun
B.
has stopped
C.
has been over
D.
has finished
【简答题】Listen to the record and choose the best answer.
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