以下组织传导速度最慢是 ()
A．窦房结
B．心房肌
C．心室肌
D．浦氏纤维
参考答案：A
用所给单词或首字母填空(5分)
小题1:On Mid-Autumn-Evening .we watch the _____(月亮).
小题2:Danny likes playing ______(电脑) games on Sunday
小题3:I learn about chinese ______(节日).
小题4:You can get some _______(信息) on the Internet
小题5:In the early morning,the air is very ________（新鲜）.
黄体退化、萎缩是由于
A．FSH和LH下降B．E3下降C．P下降D．E2下降
