He has ____ for ten years. A.dead B.been 发布时间:2017-06-02 19:22 │ 来源:www.tikuol.com 题型:选择题 问题: He has ____ for ten years.A.deadB.been deadC.be dyingD.be died
题型:选择题 — Hello, I ____ you ____ in London, how long have you been here? — I came here last week. [ ]A. don't know; were B. didn't know; were C. haven't known; are D. hadn't known; are 查看答案
题型:选择题 28岁,白带增多6天,外阴瘙痒,查外阴黏膜充血, * * 黏膜充血,分泌物呈黄绿色稀薄泡沫状。可考虑本病为()A.滴虫 * * 炎B.外阴 * * 假丝酵母菌病C.萎缩性 * * 炎D.非特异性外阴 * * 炎E.细菌性 * * 病 查看答案
题型:选择题 在25 ml 0.1 mol · L-1NaOH溶液中逐滴加入0.2mol · L-1CH3COOH溶液,溶液pH变化曲线如图所示,下列有关离子浓度的比较正确的是A.在A、B间任一点(不含A、B点),溶液中可能有c (Na+) > c (CH3COO-) >c (OH-) > c (H+)B.在B点,a>12.5,且有c (Na+) ="c" (CH3COO-) =" c" (OH-)=" c" (H+)C.在C点,c (CH3COO-) > c (Na+) > c (OH-) > c (H+)D.在D点,c (CH3COO-) +c (CH3COOH) =" c" (Na+) 查看答案