问题
单项选择题
有关脑干肿瘤的描述中，不正确的是（）
A.延髓巨大血管网状细胞瘤术后常出现消化道出血
B.小且深在的无症状海绵状血管瘤可不必手术
C.室管膜瘤边界不清，难以全切
D.脑干肿瘤DSA多无异常
E.星形细胞瘤多发生在儿童及青年
答案
参考答案：C
解析：室管膜瘤多有边界，在显微镜下多可完全切除。
搜题请搜索小程序“爱下问搜题”
有关脑干肿瘤的描述中，不正确的是（）
A.延髓巨大血管网状细胞瘤术后常出现消化道出血
B.小且深在的无症状海绵状血管瘤可不必手术
C.室管膜瘤边界不清，难以全切
D.脑干肿瘤DSA多无异常
E.星形细胞瘤多发生在儿童及青年
参考答案：C
解析：室管膜瘤多有边界，在显微镜下多可完全切除。
请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项题卡上将该项涂黑。 In eighteen thirty, only a few miles away from what is now the great city of Cincinnan, Ohio, lay a 36 and a  lmost endless forest. The area had a few settlements 37 by people of the frontier. Many of them had already left the area for settlements further 39 the west.  But among those 40 was a man who had been one of the first people to arrive there.He lived alone in a house of logs surrounded 41 all sides by the great forest. He seemed a part of the darkness and 42 of the forest, for no one had 43 known him to smile or speak an unnecessary word. His simple needs were 44 by selling or trading the skins of wild animals in the town. His little log house had a single door. Directly 45 was a window. The window was boarded up（堵住）. No one could remember a(n) 46 when it was not. And no one knew why it had been 47 . I imagine there are few people living today who ever knew the 48 of that window. But I am one, as you shall 49 . The man's name was said to be Murlock. He 50 to be seventy years old, but he was really fifty. Something other than years had been the 51 of his aging. His hair and long, full beard were white. His gray, 52 eyes were sunken. His face was wrinkled. He was tall and thin with drooping shoulders—like someone with many 53 . I never saw him. These 54 I learned from my grandfather. He told me the man's story 55 I was a boy. He had known him when living nearby in that early day.
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