下载后可任意编辑下半年内蒙古材料员专业知识与专业技能考试试卷下载后可任意编辑 下半年内蒙古材料员专业知识与专业技能考试试卷本卷共分为 1 大题 50 小题,作答时间为 180 分钟,总分 100 分,60 分及格。一、单项选择题(共 25 题,每题 2 分,每题的备选项中,只有 1 个事最符合题意) 1、强度等级为 M2.5 的水泥混合砂浆,砂的含泥量不应超过__。 A.10% B.8% C.5% D.3% 2、已知混凝土的砂石比为 0.54,则砂率为__。 A.0.35 B.0.30 C.0.54 D.1.863、普通混凝土小型空心砌块的最小外壁厚应不小于__,最小肋厚应不小于__,空心率应不小于 25%。 A.20mm,5mm B.30mm,25mm C.40mm,25mm D.30mm,15mm 4、在混凝土中,砂、石主要起__作用。 A.包裹 B.填充 C.骨架 D.胶结5、建筑石膏的硬化过程的初凝时间为__,终凝时间为__。 A.≥6min,≤30min B.≥30min,≤5h C.≥60min,≤12h D.≥45min,≤8h 6、混凝土浇筑时.板、梁和大型及中型截面的柱子等的坍落度为__。 A.10~30mm B.30~50mm C.50~70mm D.70~90mm 7、结构构件的混凝土强度应按现行国家标准《混凝土强度检验评定标准(GBJ 107—1987)》的规定分批检验评定。对采纳蒸汽法养护的混凝土结构构件,其混凝土试件应先随同结构构件同条件蒸汽养护,再转入标准条件养护,共__。 A.7d B.12d C.28d D.30d 下载后可任意编辑8、The cellphone, a device we have lived with for more than a decade, offers a good example of a popular technology’s unforeseen side effects. More than one billion are (1) around the world, and when asked, their (2) say they love their phones for the safety and convenience (3) provide. People also report that they are (4) in their use of their phones. One opinion survey (5) that "98 percent of Americans say they move away from (6) when talking on a wireless phone in public" (7) "86 percent say they ’never’ or ’rarely’ speak (8) wireless phones" when conducting (9) with clerks or bank tellers. Clearly, there exists a (10) between our reported cell phone behavior and...