Children in the United States are
exposed to many influences other than that of their families. Television is the
most significant of these influences, because the habit of watching television
usually begins before children start attending school. And, by the time that the
average child finishes high school, he or she will have spent 18,000 hours in
front of a television set as opposed to 12,000 hours in a classroom. Parents are concerned about these figures. They are also concerned about the lack of quality in television programs for children. The degree of violence in many of these shows also worries them. Even if it is unreal--a cartoon cat beating up a cartoon mouse with a baseball bat--this violence may have a negative effect on the young minds exposed to it. Studies indicate that, when children are exposed to violence, A. We should limit the children’s time in watching TV. B. We should improve educational programs for children. C. No commercials should be shown in children’s programs. D. TV programs may prevent children from developing their minds. [单选题]工作许可手续完成后,工作负责人、()应向工作班成员交待工作内容、人员分工、带电部位和现场安全措施,进行危险点告知,并履行确认手续,工作班方可开始工作。
A.专责监护人 B.工作许可人 C.工作票签发人 D.小组负责人 [单项选择]我爱打猎。
A. 是 B. 否 [多选题]用于( )方面的列入强制检定目录的工作计量器具,实行强制检定。
A. 贸易结算 B. 安全防护 C. 一般测量 D. 指示 [单选题]在10kV带电线路杆塔上与带电导线距离大于0.7m规定的作业工作需选用( )。
A.低压配工作票 B.线路第一种工作票 C.线路第二种工作票 D.书面形式布置和记录 [单项选择]可摘局部义齿后牙选择应当遵循下列哪条原则()
A. 人工牙颊舌径应比天然牙颊舌径略小 B. 人工牙龈径应当根据间隙大小选择或修整 C. 人工牙的近远中径应与缺失牙区的牙槽嵴匹配 D. 尽量选择硬度较大,耐磨耗,使用方便的硬质塑料牙 E. 以上全部 [单项选择]高倍数泡沫局部应用系统对于汽油、煤油、柴油或苯,覆盖起火部位的厚度不应小于()m。
A. 1 B. 1.3 C. 1.6 D. 2 [单选题]发生设备故障时,必须及时向( )。
A.电务调度汇报 B.车间主任 C.工长 D.车间技术员 [单选题]以下( )不属于液氨带入合成塔的现象。
A.A、入塔气体温度下降 B.B、进口氨含量升高 C.C、塔壁温度上升 D.D、触媒层温度下降,系统压力上涨 [判断题]各砌层应先砌外圈定位砌块,并与里层砌块交错连成一体。 ( )
A.正确 B.错误 [单项选择]某车间有一台风机,不需要自起动,有过负荷的可能性。配套同步电动机的额定功率为2000kW,额定电压为6kV,额定电流278A,起动电流为额定电流的6倍,电动机最大转矩为额定转矩的2倍。电网参数:电网电压6kV,最小运行方式下电动机端子三相短路时流过保护的最小三相短路电流为6250A。电动机电源母线电压互感器变比为6000/140。电动机主回路电流互感器接于相电流,变比为400/5。该同步电动机仅在一相上装设专用的GL型继电器作失步保护,下列最适合失步保护的继电器动作电流值为( )。
A. 9.0A B. 4.5A C. 3.5A D. 14A [单项选择]企财产业务分期付款最多分三期,第一期付款日期必须在保险责任起期后()天内缴付,缴付金额不得低于总保险费的()
A. 7天、30% B. 10天、50% C. 15天、40% D. 15天、50% [单项选择] The Gene Industry
Major companies are already in pursuit of commercial applications of the new biology. They dream of placing enzymes in the automobile to monitor exhaust and send data on pollution to a microprocessor that will then adjust the engine. They speak of what the New York Times calls "metal—hungry microbes that might be used to mine valuable trace metals from ocean water". They have already demanded and won the right to patent new lifeforms.
Nervous critics, including many scientists, worry that there is corporate, national, international, and inter-scientific rivalry in the entire biotechnological field. They create images not of oil spills, but of "microbe spills" that could spread disease and destroy entire populations. The creation and accidental release of extremely poisonous microbes, however, is only one cause for alarm. Completely rational and respectable scientists are talking about possibilities that stagger the imagination
A. Developing a " savings bank " of one’s organs. B. Breeding soldiers for a war. C. Producing people with cow-like stomachs. D. Using genetic forecasting to cure diseases. [多项选择]按照评价对象分,环境影响评价可以分为( )。
A. 大气环境影响评价 B. 生态环境影响评价 C. 规划环境影响评价 D. 建设项目环境影响评价 [单项选择]车产品型号“FV7160GIF”,其中数字“7”表示()。
A. 客车 B. 轿车 C. 越野车 D. 货车 [判断题]电子登记簿按年打印与询证函复印件、OA审批流程打印件以及佐证材料(包括OA流程中上传的佐证材料及柜面留存的佐证材料)一起装订保管,保管期限30年。
A.正确 B.错误 [单选题]下列哪些是环氧树脂塑料的特点:
A.绝缘性差。 B.不容易受到溶剂的侵蚀。 C.环氧树脂成型收缩率大。 D.环氧树脂强度低。 [判断题]低血钾是碱中毒时常伴有的症状。()
[多选题]遥控操作的断路器,通过(____),才能确认该断路器已操作到位。
A. 断路器红绿灯指示 B. 电流表(电压表、功率表)指示 C. 断路器(三相)机械位置指示 D. 各种遥测、遥信信号的变化 [单选题]1.27. 第27题
对由于设备原因,接地刀闸(装置)与检修设备之间连有断路器(开关),在接地刀闸(装置)和断路器 (开关)合上后,在断路器(开关)操作把手上,应悬挂( )的标示牌。 A.“禁止合闸,有人工作!” B.“禁止分闸!” C.“禁止合闸,线路有人工作!” D.“止步,高压危险!” [判断题]盐酸是无机强酸、无色液体,有刺激性气味、强腐蚀性。
A.正确 B.错误 [单选题]化疗药物毒副作用的远期反应是指( )
A.用药后1天内出现的反应 B.用药后几天至几周内反应 C.用药后几周至几月内发生 D.用药后数月至几年后才发生 E.用药后立即反应 [单项选择]AIX中查看主机名的命令是?()
A. uname B. whoami C. hostname D. who [多选题]从事牵引变电所()工作的有关人员,必须实行安全等级制度。
A.检查 B.运行 C.监督 D.检修 [单项选择]“星点”通常是指( )
A. 甘草断面裂隙呈放射状 B. 大黄表面类白色薄壁组织夹有红棕色射线所形成的锦纹 C. 人参断面红棕色的树脂道 D. 大黄根茎横切面髓部的异常复合维管束 E. 白术断面红棕色的油室 [简答题]简述国民政府时期秘书工作的改革内容。
[单项选择]用二维表来表示实体及实体之间联系的数据模型称为 ______。
A. 实体—联系模型 B. 层次模型 C. 网状模型 D. 关系模型 我来回答: 提交
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