问题
单项选择题
哪项不属于蒲肯野纤维的特点（）.
A.位于心室的心内膜下层
B.胞质中有丰富的粗面内质网
C.细胞间有发达的缝隙连接
D.将冲动快速传到心室各处引发同步收缩
答案
参考答案：B
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哪项不属于蒲肯野纤维的特点（）.
A.位于心室的心内膜下层
B.胞质中有丰富的粗面内质网
C.细胞间有发达的缝隙连接
D.将冲动快速传到心室各处引发同步收缩
参考答案：B
| 阅读下面短文，把A-E五个句子填入空缺处，使短文内容完整、正确。 | |
| __1_ Men and women, boys and girls enjoy sports. _2 _hey help people to live happily. People play different games in different seasons. Swimming is interesting in warm weather _ 3_ . Games and sports come from work. _4_ They use them in their work and also use them in their sports and games. People form different countries can not understand each other, but after a game, they often become good friends. _5_ and learn from each other.
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