与钠石灰起反应的麻醉气体是() A.七氟烷 B.异氟醚 C.安氟醚 D.笑气 E.地 发布时间:2017-09-15 19:24 │ 来源:www.tikuol.com 题型:单项选择题 问题: 与钠石灰起反应的麻醉气体是()A.七氟烷B.异氟醚C.安氟醚D.笑气E.地氟醚
题型:单项选择题 —Why isn't Lucy here with you? —Her mother's ill and she has to _________ her little sister at home. [ ]A. look after B. look at C. look around D. look for 查看答案