下图是反射弧的模式图，箭头代表神经冲动传导的方向，请据图回答：
当叩击膝盖下的韧带时，_________感受刺激，产生冲动并沿着传到脊髓里特定的_________，由其产生的神经冲动通过________传到，引起大腿上相应肌肉的收缩，使小腿突然弹起。
感受器 神经中枢 传出神经
题目分析：图中5表示该反射活动的效应器，4是传出神经，3是神经中枢、2是传入神经，1是感受器，神经冲动的传导途径是1感受器→4传入神经→3神经中枢→2传出神经→5效应器。
点评：此题为基础题，难度一般，解答此题的关键是熟练掌握反射弧的结构和功能。
| 阅读理解。 | |||
Special Events This Weekend
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| 1. You can see films _____. | |||
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| A. at the City College B. at the City Theater C. at the Captain Goodfellow D. at the Museum Theater | |||
| 2. Captain Goodfellow is probably _____. | |||
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| A. a film B. a song C. a book D. a teacher | |||
| 3. "The Zoo" _____. | |||
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| A. is a park with a lot of animals there B. is a rock group from America C. will give the first concert in America D. will give a concert in Australia | |||
| 4. If you are free at 3 o'clock on Saturday afternoon, you can _____. | |||
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| A. see Broken Windows B. see The Workers C. enjoy a concert D. listen to interesting stories | |||
| 5. If a girl wants to learn how to dance, she can go to _____. | |||
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| A. "The Zoo" B. the Rock Hall, City College C. the City Theater D. the Museum Theater |