上海土建材料员模拟试题

下载后可任意编辑上海土建材料员模拟试题下载后可任意编辑上海 土建材料员模拟试题本卷共分为 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、骨料的坚固性需按标准规定用硫酸钠溶液检验，试样须经__次循环。 A．2 B．3 C．4 D．5 2、蒸压加气混凝土砌块中，合格品的贯穿一棱二面的裂纹长度不得大于裂纹所在面的裂纹方向尺寸总和的__。 A．1/3 B．2/3 C．1/2 D．1/43、混凝土强度标准差宜根据同类混凝土统计资料计算确定，计算时，当混凝土强度等级为 C20 和 C25 级，其强度标准差计算值小于 2.5MPa 时，计算配制强度用的标准差应取不小于__。 A．2.5MPa B．3.0MPa C．3.5MPa D．4.0MPa 4、菱苦土的密度为 3.10～3.40g/cm3，堆积密度为__kg/m3。 A．500～700 B．800～900 C．1000～1100 D．1200～14005、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 our actual behavior.Cellphone users--that is to say, most of us--are (11) instigators and victims of this form of conversational panhandling, and it (12) a cumulatively negative effect on social space. As the sociologist Erving Gotfman observed in another (13) , there is something deeply disturbing about people who are" (14) contact"...