正常QRS波群时限为A.≤0.10sB.≤0.11sC.≤0.12sD.≤0.13sE.≤0.

正常QRS波群时限为

A．≤0．10s

B．≤0．11s

C．≤0．12s

D．≤0．13s

E．≤0．14s

请帮忙给出正确答案和分析，谢谢！

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