The growth of population during the
past few centuries is no proof that population will continue to grow straight
upward toward infinity and doom. On the contrary, demographic history offers
evidence that population growth has not been at all constant. According to
paleo-ecologist Edward Deevey, the past million years show three momentous
changes. The first, a rapid increase in population around one million B. C.,
followed the innovations of tool-making and tool-using. But when the new
power from the use of tools had been exploited, the rate of world population
growth fell and became almost stable. The next rapid jump in population started perhaps 10,000 years ago, when men began to keep herds, plow and plant the earth. Once again when initial productivity gains had been absorbed, the rate of population growth abated. These two episodes suggest tha A. Human population expands at a straight upward trend. B. Population growth has shown ups and downs in demographic history. C. Population growth can not be regarded as a social failure. D. Increase in population is related to productivity. [判断题]除钢轨焊补作业外,不应在钢轨的任何部位实施引弧、电弧焊、电阻点焊、黄铜钎焊等作业。
A.正确 B.错误 [单选题]一般线路中的熔断器有()保护。:
A.短路 B.过载 C.过载和短路 [多选题]作业前,应检查沿线( )是否齐全完好、可靠,信号是否能对打。
A.防护链 B.急停闭锁装置 C.扩音电话 D.各种线缆 [单选题]关于mysql_select_db的作用描述正确的是( )
A.连接数据库 B.连接并选取数据库 C.连接并打开数据库 D.选取数据库 [单选题]主要作用是抗革兰阴性杆菌的半合成青霉素是
A.阿莫西林 B.哌拉西林 C.替卡西林 D.替莫西林 E.苯唑西林 [判断题]120km/h以上区段且线间距小于6.5m时,V形停电作业一般不使用车梯和梯子。( )(职工)(应知应会-铁总运[2017]25号,第七十条.)
A.正确 B.错误 [多选题]CRH5A型动车组电茶炉正常工作时( )灯点亮
A.加热 B.热水 C.缺水 D.电源 [判断题]相关方的安全监督管理实行“谁主管谁负责,谁用工谁管理”的原则。()
A.正确 B.错误 [单选题]柴油机曲轴齿轮与曲轴的配合属于( )。
A.过渡 B.动配合 C.过盈配合 [单项选择]根据我国《合伙企业法》第61条的规定,有限合伙企业由( )合伙人设立;但是,法律另有规定的除外。有限合伙企业至少应当有一个普通合伙人。
A. 30个以下 B. 2个以上30个以下 C. 2个以上50个以下 D. 50个以下 [判断题]报关单位向海关工作人员行贿的,撤销报关注册登记,并处10万元以下罚款;构成犯罪的,依法追究刑事责任,并不得重新注册登记为报关企业。( )
[填空题]
阅读下面这篇短文,短文后有2项测试任务:(1)l~4题要求从所给的6个选项中为第 2~5段每段选择1个正确的小标题;(2)第5~8题要求从所给的6个选项中选择4个正确的选项,分别完成每个句子。请将答案写在相应的横线内。 {{B}}The Fridge{{/B}}
The fridge is considered a necessity. It has been so since the 1960s when packaged food first appeared with the label: "store in the refrigerator." In my fridgeless Fifties childhood, I was fed well and healthily. The milkman came daily, the grocer, the butcher, the baker, and the ice-cream man delivered two or three times a week. The Sunday meat would last until Wednesday and surplus bread and milk became all kinds of cakes. Nothing was wasted and we were never troubled by rotten food. Thirty years on, food deliveries have ceased, fresh vegetables are almost unobtainable in the country. The invention of the fridge contributed comparatively little to the art of food preservation. A vast variety of well-tried techniques already existed--natural cooling, drying, smoking, slating, sugaring, [判断题]《铁路旅客运输规程》中规定,等级是同等距离以承运人提供的乘车条件不同确定。()
A.正确 B.错误 [单项选择]某患者,女性。72岁。自汗,怕风,常易感冒,哮证反复发作,哮证发作前打嚏,气短声低,咳痰色白质稀,舌苔薄白,质淡,脉虚大。急性期缓解后由此,采用的最为恰当的方剂为()
A. 香砂六君子汤 B. 生脉饮 C. 四君子汤 D. 玉屏风散 E. 补中益气汤 [判断题] 物体之间接触一定会有弹力。
A.正确 B.错误 [判断题]B-B-B-001 3 1 3
电缆配盘时,应将K、e值较大的低频四线组电缆单盘配置在一个低频段的两端。( ) A.正确 B.错误 [单项选择]在标准ASCII码表中,已知英文字母A的ASCII码是01000001,则英文字母E的ASCII码是( )。
A. 01000011 B. 01000100 C. 01000101 D. 01000010 [单选题]以下属于原核细胞型微生物的是
A. 梅毒螺旋体 B. 白假丝酵母菌 C.HIV D. 指甲癣真菌 E. 乙肝病毒 [多选题]工作负责人 (监护人)的安全责任( )。
A. 工作前向工作班全体成员告知危险点,交待作业活动范围、内容及安全措施和注意事项 B. 工作班人员变动是否合适 C.正确、安全地组织工作 D. 督促、监护工作班成员执行现场安全措施和技术措施 E. 确认工作票所列安全措施正确、完备,符合现场实际条件,必要时予以补充 [单选题]单选题"对于BB和B级客户,常规贷后检查频率提高到至少 一次
A.一个月 B.二个月 C.每季 D.每半年" [填空题]《规程》规定,旅客乘坐提供空调的列车时,应购买相应等级的()或()。
[单项选择]
A. Still B. Anyway C. Besides D. Nevertheless [判断题]严肃与谨慎相结合的政策,是指导人民警察进行治安管理工作的一项重要政策。 ( )
[单选题]抗洪抢险涉水行动时,不正确的是( )
A.注意避开带电设备及水下的沟槽等危险部位 B.接近建筑时警惕高空坠物,防止不必要的伤亡 C. 涉水行动时要注意避开带电设备和线路以及水面下的沟槽.窨井.洞穴等危险部位 D.高山河谷和地质灾害易发区域实施水域救援时,要设置观察哨,靠近山体的道路一侧行进。 [单选题]对房屋出租人的下列行为不应给予治安管理处罚的是( )。
A.将房屋出租给无身份证件的人居住 B.不按规定登记承租人姓名、身份证件的种类和号码 C.明知承租人利用出租房屋进行犯罪活动,不向公安机关报告 D.放任承租人从事噪声扰民的经营项目 我来回答: 提交
|