题目内容

隐血试验阳性时,在消化道溃疡,阳性率 ,特点呈 阳性;在消化道恶性肿瘤,阳性率可达 ,特点呈 阳性,粪便隐血试验常作为消化道恶性肿瘤的诊断筛选指标。( )

A. 40-70%;间歇;95%;持续
B. 95%;持续;40-70%;间歇
C. 40-70%;间歇;85%;持续
D. 85%;持续;40-70%;间歇

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粪便隐血试验化学法假阳性反应在以下哪种情况可能出现?( )

A. 进食动物血、肉类及进食大量蔬菜时
B. 粪便标本放置时间过长
C. 口服大量维生素C
D. 过氧化氢浓度低或试剂受光、受热、受潮时

粪便标本采集原则是及时、选异常、多次送检。( )

A. 对
B. 错

公差的英文是

A. deviation
B. tolerance
C. system
D. variation

H7 :The uppercase letter "H" indicates that the system is ______. The lowercase letter "h" expresses that the system is _____________.

A. the basic hole system、the basic hole system
B. the basic shaft system、the basic shaft system
C. the basic hole system、the basic shaft system
D. the basic shaft system、the basic hole system

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