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【单选题】Biological ClockWhen the sun rises on a warm and sunny day, you can see some flowers open up. When they close late in the afternoon, other flowers open.Biological rhythms（生物节律）, like the opening and c...
A.
But where can you find it?
B.
This makes them feel tired.
C.
In the summer they fly back to have babies.
D.
We are learning more and more about them.
E.
Biological clocks can be adjusted.
F.
Other rhythms are based on months, seasons or years.
【单选题】小肠平滑肌的基本电节律起搏点位于（）。
A.
十二指肠球部
B.
十二指肠降段
C.
十二指肠近胆管入口处的纵行肌细胞
D.
十二指肠壶腹部
E.
屈氏韧带旁
相关题目：
【单选题】Biological ClockWhen the sun rises on a warm and sunny day, you can see some flowers open up. When they close late in the afternoon, other flowers open.Biological rhythms（生物节律）, like the opening and c...
A.
But where can you find it?
B.
This makes them feel tired.
C.
In the summer they fly back to have babies.
D.
We are learning more and more about them.
E.
Biological clocks can be adjusted.
F.
Other rhythms are based on months, seasons or years.
【单选题】小肠平滑肌的基本电节律起搏点位于（）。
A.
十二指肠球部
B.
十二指肠降段
C.
十二指肠近胆管入口处的纵行肌细胞
D.
十二指肠壶腹部
E.
屈氏韧带旁
参考解析：
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