关于齿状线的解剖特点，下列错误的是（）。
A.齿状线以上是直肠上下动脉供应；齿状线以下是肛管动脉供应
B.齿状线以上的直肠上静脉丛是通过直肠上静脉回流入门静脉；齿状线以下的直肠下静脉丛是由肛管静脉回流入下腔静脉
C.齿状线以上是黏膜，由自主神经控制，无痛觉
D.齿状线以上的淋巴回流主要至腹股沟淋巴结
E.齿状线以下至肛缘为解剖性肛管，长3～4cm
参考答案：D
解析：齿状线以上的淋巴主要回流至腹主动脉周围的淋巴结，齿状线以下的淋巴主要回流至腹股沟淋巴结。
| 阅读理解。 | |||
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| 1. There is _____ in Green Movie Theater this week. | |||
| A. one Chinese movie B. two Chinese movies C. two American movies D. three Chinese movies | |||
| 2. If a man with his child goes to Green Movie Theater on Sunday, they'll pay _____ for the movie. | |||
| A. $3 B. $3.5 C. $4.5 D. $6 | |||
| 3. You can see the movie _____ in Green Movie Theater on Friday morning. | |||
| A. Happy Feet B. Arthur and the Minimoys C. The Secret of the Magic Gourd D. Little Miss Sunshine | |||
| 4. There are three movies on _____ and _____. | |||
| A. Wednesday, Friday B. Tuesday, Wednesday C. Monday, Thursday D. Saturday, Sunday | |||
| 5. From this poster (海报), we know _____ is a director. | |||
| A. Liang Yongqi B. Alan Arkin C. Luc Besson D. Mia Farrow |