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【单选题】
如心率规则,心电图走纸速度为25mm/s,则一个RR(或PP)间期的距离为4个大格,则病人心率为( )A.
60次/分
B.
75次/分
C.
80次/分
D.
85次/分
E.
100次/分
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A.
if; there is ; refreshed
B.
whether ; it is ; refresh
C.
that ; there is ; refresh
D.
whether ; there is ; refreshed
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