When Michael cleared the bar at 17 feet, he was very excited.
查看答案
Michael was deeply influenced by both his father and his mother.
A. 对
B. 错
代表心房除极的波是
A. P波
B. QRS波
C. T波
D. U波
E. P-R段
代表心室复极的波是
A. P波
B. QRS波
C. T波
D. U波
E. P-R段
测量R—R间期为0.8秒，心率为( )次／min
A. 110
B. 100
C. 80
D. 75
E. 115
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