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【单选题】
患者男性,15岁。因乏力,面色苍白前来就诊,血液分析结果RBC 3.14x10^12/L ,HGB 62g/L ,HCt 0.21,RDW21%。该患者诊断应首先考虑:A.
再生障碍性贫血
B.
溶血性贫血
C.
骨髓增生异常综合征
D.
缺铁性贫血
E.
慢性失血性贫血
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举一反三
【单选题】If you ______ a liquid over something, you scatter a lot of small drops of the liquid on it.
A.
spray
B.
pour
C.
water
D.
spring
【单选题】Les llevaron a una casa de canpo y los dejaron allí solos .
A.
Solo los dejaron allí y no en otro lugar
B.
Los dejaron allí sin ninguna compañía
【简答题】A controversy erupted in the scientific community in early 1998over the use of DNA(deoxyribonucleic acid)fingerprinting in criminal investigations.DNA fingerprinting was introduced in 1987as a method ...
【单选题】There is strong evidence that the of a father increases the probability that a youngster will use drugs and engage in criminal activity.
A.
absence
B.
disappearance
C.
attention
D.
concern
【单选题】When a liquid wets a solid completely，the contact angle between the liquid and the solid is( )
A.
0°
B.
45°
C.
90°
D.
135°
【单选题】While flowing through the volute in a centrifugal pump, part of the （） energy of the liquid is converted to （） energy.
A.
kinetic；pressure
B.
kinetic；essential
C.
pressure；kinetic
D.
pressure；height
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