| The destruction of our natural
resources and contamination of our food supply continue to occur, largely
because of the extreme difficulty in affixing legal responsibility on those who
continue to treat our environment with reckless abandon. Attempts to prevent
pollution legislation, economic incentives and friendly persuasion have been met
by lawsuits, personal and industrial denial and long delays --not only in
accepting responsibility, but more importantly, in doing something about
it. It seems that only when government decides it can afford tax incentives or production sacrifices is there any initiative for change. Where is industry’s and our recognition that protecting mankind’s great treasure is the single most important responsibility If ever there will be time for environmental health pr A. inevitable phenomenon of social developing B. few people are aware of it C. the tax exerted on manufacturer is too heavy D. difficulty in affixing legal responsibility on the people who caused the problem [单选题]牵引逆变器的功率元件采用大功率电力电子器件（ ）。
A.绝缘栅双极型晶体管 B.集成门极换流晶闸管 C.金属-氧化物半导体场效应晶体管 D.栅控晶闸管 [单项选择]以下哪个国家发射过探月卫星（）
A. 印度 B. 韩国 C. 日本 [单选题]人工挖孔桩上下应有可靠的通话联络。孔下作业不得超过两人，每次不得超过（）h，孔上应设专人监护。
A.2 B.2.5 C.3 D.3.5 [多项选择]依据提供资料设计混凝土配合比的步骤是（）。
A. 计算混凝土的试配强度 B. 计算水灰比 C. 选用单位水量 D. 确定养护条件、方式 E. 选用合理砂率，确定砂石单位用量 [单选题]直接接入高压配电网的分布式电源的启停应执行（ ）的指令。
A.变电运维部门 B.电网调度控制中心 C.营销部门 D.线路运维部门 [单项选择]The goods are now ready for( )．
A. wool B. water proof C. packing D. Virus [判断题] 零序过电流保护为保证线路经较大过渡电阻故障时能可靠动作切除故障,不经 3U0突变量闭锁。在发生TA断线时,零序过电流保护一定不
A.正确 B.错误 [多选题] 2016 年以来, 国家电网有限公司实行的“国网阳光扶贫行动”包括以下哪几项重点任务?( )
A. 实施村村“通动力电”工程 B. 实施国家光伏扶贫项目接网工程 C. 实施五县区定点扶贫工程 D. 新一轮农网改造升级工程 我来回答: 提交
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