吉林省2017年材料员试题43.doc

吉林省2017年材料员试题43_移动文库 吉林省2017年材料员试题 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、《混凝土质量控制标准》(GB 50164—1992)规定，混凝土拌和物维勃稠度分为4级，干硬性混凝土的维勃稠度为__。 class=“txt”A．＞31s B．21～30s C．11～20s D．5～10s 2、The cellphone, a device we have lived with for more than a decade, offers a good example of a popular technologyamp;rsquo;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 quot;98 percent of Americans say they move away from (6) when talking on a wireless phone in public(7) quot;86 percent say they amp;rsquo;neveramp;rsquo; or amp;rsquo;rarelyamp;rsquo; speak (8) wireless phoneswhen 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) contactin social situations because they are blatantly refusing to (15) to the norms of their immediate environment. P