| The biggest safety threat facing
airlines today may not be a terrorist with a gun, but the man with the portable
computer in business class. In the last 15 years, pilots have reported well over
100 incidents that could have been caused by electromagnetic interference. The
source of this interference remains unconfirmed, but increasingly, experts are
pointing the blame at portable electronic devices such as portable computers,
radio and cassette players and mobile telephones. RTCA, an organization which advises the aviation industry, has recommended that all airlines ban such devices from being used during "critical" stages of flight, particularly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to individual airlines. And alth A. is in favor of prohibiting passengers’ use of electronic devices completely B. regards it as unreasonable to exercise a total ban during flight C. hasn’t formed his own opinion on this problem D. has overestimated the danger of electromagnetic interference [判断题]收益递减规律对一宗土地来说，表现在对该土地的利用强度超过一定限度后，收益开始下降。 （ ）
A.正确 B.错误 [判断题]国家和社会治理需要法律和道德共同发挥作用。
A.正确 B.错误 [单选题]作业人员应具备必要的（），学会紧急救护法，特别要学会触电急救。作业人员应具备必要的安全生产知识，学会紧急救护法，特别要学会（）。
A.A.安全生产知识触电急救 B.B.技能等级.溺水急救 C.C.专业学历创伤急救 D.D.工作经验高空急救 E.略 F.略 G.略 [多选题]41. 施工单位应当根据电力建设工程施工特点、范围，制定( )，对施工现场易发生事故的部位、环节进行监控。
A.应急救援预案 B.特殊施工方案 C.现场处置方案 D.运输路径 [判断题]高架绝缘斗臂车的工作位置应选择适当，支撑应稳固可靠，并有防倾覆措施。
A.正确 B.错误 [单项选择]普通液压油的使用环境温度为（）。
A. -40℃---0℃ B. -20℃----0℃ C. 0℃----20℃ D. 0℃----40℃ [单选题]自行式铲运机的经济运距为( )
A.500-800m B.500-1200m C.800-1200m D.800-2000m [判断题]道路运输管理机构的工作人员实施监督检查时,应当有3名以上人员参加,并向当事人出示交通运输部统一制式的交通行政执法证件。
A.正确 B.错误 [多选题]检测钢结构厚型防火涂层厚度的常用设备有（ ）。
A.A、涂层测厚仪 B.B、探针 C.C、游标卡尺 D.D、数字式测厚仪 [填空题]《中国铁路上海局集团有限公司客运岗位作业标准实施意见》上铁办客（〔2020〕38 号）规定，客运值班员严格落实<--NRC-->，巡视检查各岗位，指导、督促按标作业。
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