在管道分类时按压力分类,水暖管道属()A、低压 B、中压 C、高压 D、超高压 发布时间:2019-07-01 22:04 │ 来源:www.tikuol.com 题型:单项选择题 问题: 在管道分类时按压力分类,水暖管道属()A、低压B、中压C、高压D、超高压
题型:单项选择题 ----The Singaporean singer Stefanie Sun took the Most Popular Female Award in Hong Kong.----But when she studied in middle school, no fans could have imagined how well she _______ in the world of entertainment. (孙燕姿) A.would doB.was doingC.had doneD.did 查看答案
题型:单项选择题 胃幽门部幽门括约肌的组成A.由胃壁肌层内层的斜行肌增厚组成B.由胃壁肌层中层的环行肌增厚组成C.由胃壁肌层外层的斜行肌增厚组成D.由胃壁肌层内层的斜行肌及中层的环形肌增厚组成E.由胃壁肌层内层的斜行肌及外层的纵行肌增厚组成 查看答案