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多选题
About the sinoatrial node, which of the following descriptions are not correct?
A
It is known as the‘pacemaker’of the heart.
B
It is located in the posterior wall of the left atrium.
C
It is ellipse in shape.
D
It generates an impulse at the rate of about 50/min.
E
The impulse generated by the sinoatrial node travels through the internodal tract (结间束) to reach
答案解析
正确答案：ACE
题目纠错
