第27题: [单项选择]血管性头痛脑血流灌注显像示( ) A. 病灶灌注减少或缺失,部分对侧小脑半球灌注减低 B. 基底节不对称灌注减低伴大脑各叶灌注减低 C. 间歇期血流灌注减低,发作期病灶处灌注增高 D. 额、顶、颞叶为主的广泛血流灌注减少,表现为“分水岭”征 E. 血流灌注表现各异或减低或局灶性增高,或两者现象并存 参考答案:E
A. whose parents were worried about them B. who would have had to walk otherwise C. who could not walk D. who had to travel a long way 参考答案:D 答案解析:根据文章第二段的第一句可知答案为[D]。迄今为止(即过去),郡议会(the County Council)只为那些家离学校超过三英里的孩子们或有特殊原因的孩子们提供公共汽车的服务。