一侧颈内动脉闭塞不出现临床症状,是由于() A.同侧颈外动脉未闭塞 B.对侧颈内动脉 发布时间:2017-05-09 16:41 │ 来源:www.tikuol.com 题型:单项选择题 问题: 一侧颈内动脉闭塞不出现临床症状,是由于()A.同侧颈外动脉未闭塞B.对侧颈内动脉未闭塞C.正常的脑底动脉环可迅速建立侧支循环D.双侧椎动脉末端闭塞E.颅内血管变异
题型:单项选择题 I really enjoyed your speech, ______ there were some parts I didn't quite understand. [ ]A. because B. unless C. though D. after 查看答案