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【单选题】
“小儿麻痹症”是由于病毒侵染了位于脊髓的传出神经元的细胞体，而传入神经元及神经中枢未受到侵染，所以严重的小儿麻痹症患者会表现出下肢 [ ]
A.
能运动，对刺激有感觉
B.
运动障碍，对刺激有感觉
C.
不能运动，对刺激无感觉
D.
运动障碍，对刺激无感觉
参考答案：
参考解析：
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举一反三
【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