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：[解题思路] 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。偶有髓外胶质瘤；脊膜瘤发生于蛛网膜或软脊膜，约85%～90%位于髓外硬脊膜内，其余骑跨于硬脊膜内外或单纯硬脊膜外者各占一半左右；胚胎残余肿瘤约3/4位于脊髓外硬脊膜下，部位位于脊髓内，少数位于硬脊膜外；神经鞘瘤起源于神经根的鞘膜，大多(62%～74%)位于髓外硬脊膜下，位于硬脊膜外者占8．9%～31．8%，另外，约6．2%～17%骑跨于硬脊膜内外，极少有髓内生长者。
第Ⅱ卷(非选择题 共35分) 第四部分：写作（共两节，满分35分） 第一节：任务型读写（共10小题；每小题1分，满分10分） 阅读下列短文，根据所读内容在文章后的横线上填入恰当的单词。注意：每个题号后只填1个单词。 Educating girls quite possibly harvests a higher rate of return than any other investment available in the developing world. Women’s education may be all unusual field for economists(经济学家), but increasing women’s contribution to development is actually as much an economic as a social issue. And economics, with its focus on incentives(鼓励),provides an explanation for why so many girls are deprived of(剥夺) an education. Parents in low-income countries fail to invest in their daughters because they do not expect them to make an economic contribution to the family: girls grow up only to marry into somebody else’s family and bear children. Girls are thus seen as less valuable than boys and are kept at home to do housework while their brothers are sent to school — the prophecy(预言) becomes self-fulfilling, trapping women in avicious circle(恶性循环) of neglect. An educated mother, on the other hand, has greater earning abilities outside the home and faces an entirely different set of choices. She is likely to have fewer but healthier children and can insist on the development of all her children, ensuring that her daughters are given a fair chance. The education of her daughters then makes it much more likely that the next generation of girls, as well as of boys, will be educated and healthy. The vicious circle is thus transformed into a virtuous circle. Few will argue that educating women has great social benefits. But it has enormous economic advant-ages as well. Most obviously, there is the direct effect of education on the wages of female workers. Wages rise by 10 to 20 percent for each additional year of schooling. Such big returns are impressive by the standard of other available investments, but they are just the beginning. Educating women also has a significant impact on health practices, including family planning. Topic: The significance of female ______76_____ in developing countries
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