在脊髓髓内外肿瘤的鉴别诊断中，哪项是错误的（）
A.髓内肿瘤早期常有排便功能障碍
B.髓外肿瘤早期常有排便功能障碍
C.髓内肿瘤的感觉障碍是自上而下发展的
D.髓外硬膜下肿瘤可能有椎间孔扩大
E.髓外硬膜下肿瘤脊髓造影常呈偏心状、杯口状充盈缺损
参考答案：B
解析：髓内肿瘤早期即有膀胱直肠功能障碍，而髓外硬膜下肿瘤早期多为神经根痛，最后才压迫脊髓导致排便功能障碍。
| 阅读理解。 | |||||
Here are some short messages. Amy got all of them on her mobile phone yesterday. Please read them carefully and find the best answers to the questions.
| |||||
| 1. What did Amy get yesterday? | |||||
| A. Some letters. B. Some books. C. Some messages D. Some e-mails. | |||||
| 2. What did Mr Lee do for Amy? | |||||
| A. He mended her computer. B. He bought her a film ticket. C. He helped her buy some meat and vegetables. D. He helped her answer the phone call. | |||||
| 3. What’s Harry Potter and the Deathly Hallows? | |||||
| A. A book. B. A game. C. A song. D. A film. |