| The history of modem pollution problems
shows that most have resulted from negligence and ignorance. We have an
appalling tendency to interfere with nature before all of the possible
consequences of our actions have been studied in depth. We produce and
distribute radioactive substances, synthetic chemicals and many other potent
compounds before fully comprehending their effects on living organisms. Our
education is dangerously incomplete. It will be argued that the purpose of science is to move into unknown territory, to explore, and to discover. It can be said that similar risks have been taken before, and that these risks are necessary to technological progress. These arguments overlook an important element. In the past, risks taken in the name of scientific progress were restricted to a small place and brief period of time. A. the effects of the modem pollutants on the living organisms. B. the present situation is remarkedly different from the past. C. the stress of progress of science to the neglect of environmental protection. D. the serious consequence followed by the development of science. [判断题]我们党干革命、搞建设、抓改革,都是为了让人民过上幸福生活。
A.正确 B.错误 [判断题]小型养机具未设置安未经产品认证和状态不良,严禁上道使用。( )
A.正确 B.错误 [单选题]新敷设的带有中间接头的电缆线路,在投入运行()个月后,应进行预防性试验。
A.1 B.3 C.5 [单选题](66839)东风8B型内燃机车时间继电器延时时间整定值为45 s,重复允差为( )(2.0分)
A.1 s B.1.5 s C.2.0 s D.2.5 s [单选题]（）在系统有接地的情况下合解环操作。
A.严禁 B.可以 C.视情况而定 [判断题]线网管控部应及时收集所辖线路车站周边活动信息，对客流变化趋势做好预判，报线网管控部。
A.正确 B.错误 [单项选择]零担货运站以( )为主。
A. 货流 B. 人流 C. 车流 D. 工艺流线 [判断题]96. 行政执法机关只能依照法律、法规才能实施行政许可和行政处罚。
A.正确 B.错误 [单选题]氩气密度约为空气的( )倍,比空气重,焊接时在熔池上方形成一层较好的覆盖层起到保护作用。
A.1.4 B.1.0 C.1.6 D.1.8 [单选题]跨局回送铁路篷布限采用整车方式，每车一般不少于100张，少于100张时需经()调度批准。
A.车站 B.路局 C.总公司 D.站段 我来回答: 提交
|
