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【单选题】Every year more than half a million American kids have drainage(排泄) tubes surgically implanted in their ears to combat persistent infections. The procedure, known as tympanostomy, may not be as (62) a...
A.
[A] feeling [C] health
B.
[B] hearing [D] memory
【单选题】Section BDirections: There are 2 passages in this section．Each passage is followed by some questions or unfinished statements．For each of them there are four choices marked A, B, C and D．You should de...
A.
could not easily be absorbed by the human body
B.
were potentially harmful to people's health
C.
were too expensive for daily consumption
D.
could not provide any cure for vitamin deficiencies
【单选题】采用下列哪一种方法有助于鉴别小的肾血管平滑肌脂肪瘤与小肾癌：（）
A.
薄层连续扫描以发现脂肪成分
B.
增强扫描观察肿瘤强化情况
C.
螺旋CT扫描
D.
冠状位重建
E.
以上都不是
【单选题】患者因血肌酐、尿素氮增高行超声检查：双肾体积缩小，肾皮质回声增强，皮髓质分界不清，肾内结构紊乱不清，彩色多普勒超声示肾内血流信号稀少。最可能的诊断是（）
A.
急性肾衰竭
B.
急性肾小球肾炎
C.
急性肾盂肾炎
D.
急性肾小管坏死
E.
慢性肾衰竭