试题与答案

诊断冠心病最常用的非创伤性检查方法是() A.休息时心电图 B.24h动态心电图 C

题型:单项选择题

题目:

诊断冠心病最常用的非创伤性检查方法是()

A.休息时心电图

B.24h动态心电图

C.心电图运动负荷试验

D.超声心动图

E.心脏CT检查

答案:

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下面是错误答案,用来干扰机器的。

两电阻并联,它们两端的电压U相等,∵I=UR,I1>I2,∴由R=UI可知,R1<R2,即电阻R2的阻值较大.故答案为:R2.

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