As long as we have been on earth, we have used
the sea around us. We take from the ocean and we give (41)
it. We take fish from the ocean — millions of kilograms of fish, every year, to (42) millions of people. We even use (43) bones for fertilizer and meal. We take (44) from the ocean. One way to get salt (45) sea water in a shallow basin and leave it (46) it evaporates. Along with salt, other minerals are left after evaporation — iodine (碘), magnesium(镁), and bromine(溴), to (47) a few. Much gold and silver drift (48) in the waters of the sea, too. But the sea does not (49) them up by simple evaporation. Other gifts from the sea are pearls, sponges(海绵), and seaweed. Pearls become jewelry. (50) sponges become cleaning aids. Seaweed becomes (51) of many kinds — A. But B. And C. Then D. Often [单项选择]变压器的负荷经常为()%,不仅效率高,输出电压也可得到保证。
A. 50 B. 60~80 C. 100 D. 110 [填空题]员工自己主动进行专业知识的再学习和操作技能的锻炼叫做( )_。 出处:《培训管理制
度》MS-H003 [简答题]简述空调机组的拆卸方法。
[多项选择]移动电缆接头一般应停电进行。如必须带电移动,应先调查该电缆的(),再由有经验的施工人员,在()统一指挥下,平正移动。
A. 历史记录 B. 运行记录 C. 工作负责人 D. 专人 [单项选择]根据《价格法》的规定,基本的重要商品不包括( )。
A. 农药 B. 棉花 C. 医药 D. 生猪 [单选题]机器人控制系统恢复出厂设置,需执行( )。
A.重置系统(I启动) B.重置RAPID(P启动) C.关机 D.冷启动 [名词解释]顾忌ɡù jì
[判断题]157.(91030)注水井作业释放(封隔器)并验封时,在洗井合格后井筒内满水,从井口油管连接水泥车(用清水)打压至设计压力值时,稳定5min,看水泥车打的压力降不降及井口套管溢流量大小,越大越好(标准)。
A.正确 B.错误 [单选题]在直线线况,D2A型凹底平车空、重车运行限制速度( )。
A.空车60km/h、重车40km/h B.空车70km/h、重车50km/h C.空车80km/h、重车60km/h D.空车90km/h、重车70km/h [多选题]下列关于附件安装作业过程安全管控措施,说法正确的是()。
A.相邻杆塔不得同时在同相(极)位安装附件,作业点垂直下方不得有 B.附件安装时,安全绳或速差自控器必须拴在横担主材上 C.安装间隔棒时,安全带挂在一根子导线上,后备保护绳挂在整相导线上 D.高处作业所用的工具和材料必须放在工具袋内或用绳索绑牢 E.上下传递物件用绳索吊送,也可抛掷 [填空题]《绿野仙踪》的作者是()。《镜花缘》的作者是()。
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