( )是改善砂浆和易性而加入的无机材料。A.胶凝材料 B.细骨料 C.外加剂 D. 发布时间:2017-05-30 10:35 │ 来源:www.tikuol.com 题型:单项选择题 问题: ( )是改善砂浆和易性而加入的无机材料。A.胶凝材料B.细骨料C.外加剂D.掺和料
题型:单项选择题 男,25岁,平素体健,因膝关节外伤在腰麻下行膑骨切除术。术后第2天发生剧烈头痛,坐起时加重,平卧后减轻,该病人术后头痛发生的原因是A.局麻药中加入肾上腺素B.腰麻后脑脊液外流引起的低压性头痛C.同时伴有颅内病变D.麻醉药物选择不当E.腰麻穿刺针太粗 查看答案
题型:单项选择题 The sales manager of the company suggested more money is to spent in a more effective advertising campaign and better packaging design.A.is spending onB.will be spent inC.will be spent onD.be spent on 查看答案