题型:填空题 “Wechat”(微信)really makes a great _____to people’s life. It’s easier for us to keep in touch with others.A.choiceB.differenceC.problemD.surprise 查看答案
题型:填空题 脊髓的被膜()A.临床上可将麻醉药注入硬脊膜外隙,以阻滞脊神经根B.硬脊膜外隙位于硬脊膜与椎管壁之间,呈负压C.自外向内有硬脊膜、蛛网膜和软脊膜D.硬脊膜外隙中充满疏松结缔组织、脂肪和椎内静脉丛E.硬脊膜外隙与颅内硬脑膜外隙相通 查看答案