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【单选题】In a purely biological sense, fear begins with the body’’s system for reacting to things that can harm us—the so-called fight-or-flight response. "An animal that can’’t detect danger can’’t stay alive...
A.
reactions of humans and animals to dangerous situations are often unpredictable
B.
memories of significant events enable people to control fear and distress
C.
people’’s unpleasant memories are derived from their feelings of fear
D.
the amygdala plays a vital part in human and animal responses to potential danger
【单选题】下述有关运动神经元病的表述中不正确的是（）
A.
上、下运动神经元损害可同时并存
B.
家族性少见
C.
锥体束变性从高位脊髓向下或向上发展
D.
括约肌功能通常受影响
E.
可出现延髓麻痹
【单选题】心的节律冲动正常传导路径为
A.
窦房结→心房肌→房室结→结间束→ His 束→浦氏网
B.
窦房结→结间束→房室结→ His 束→左右束支→浦氏网
C.
房室结→ His 束→结间束→窦房结→左右束支→浦氏网
D.
心房肌→窦房结→房室结→结间束→左右束支→浦氏网