题目内容
第二篇A Very Slow Ride The surface of the earth may seem very stable to you.But you might be amazed if you knew some of the things that are going on under that surface. The earth has an outer shell of rigid pieces called tectonic plates (地壳构造板块).The plates include both ocean floor and dry land.Some have whole continents on top of them.The continents on top of the plates are just going along for a slow ride,moving only about four inches per year.But even this small movement causes three types of big interactions. One type is ocean ridges.These ridges develop in places where two plates are moving away from each other.As the plates separate,hot magma(岩浆)flows up to fill the space.New crust(地壳)builds up on the plate boundaries and causes ocean ridges.These ridges form long mountain ranges,which only rise above the ocean surface in a few places. Another type of reaction-trenches-occurs between two plates that are moving toward each other.As the plates meet,one bends downward and plunges undemeath the other.This forms deep ocean trenches.The Marianas Trench off Guam in the western Pacific Ocean has a depth of more than 36,000 feet.This is the lowest point on the ocean floor.If the leading edges of the two colliding plates carry continents,then the layers of rock in the overriding plate crumple(变皱)and fold.A plate that carried what is now lndia collided with the southern edge of the plate that carried Europe and most of Asia.This caused the Himalayas,the world’s highest mountains. The third reaction is transform faults(转换断层).These faults occur where two plates that are traveling in opposite directions slide past each other.Severe earthquakes can occur.The San Andreas Fault in Califomia is a good example of this type of movement. This passage is mostly about
查看答案
搜索结果不匹配？点我反馈
更多问题
案例分析题某城市跨线立交桥工程，桥梁全长811m，共计24跨，桥梁下部结构有22根直径1.5m的钻孔灌注桩，采用反循环钻机成孔。项目部针对钻孔桩数量多，经招标程序将钻孔作业分项工程分包给甲机械施工公司，由甲公司负责组织钻孔机械进行钻孔作业。施工过程中现场发生如下事件：事件一：项目部在现场文明施工检查时发现：原有泥浆沉淀池已淤积，正在进行钻孔施工的泥浆水沿排水沟直接流到工地附近的河道里，现场土堆旁有未燃尽的油毡碎片。事件二：甲公司液压起重机起吊钢筋笼时，因钢筋笼的U形吊环与主筋焊接不牢，起吊过程中钢筋笼倾倒，所幸作业人员及时避开，没有造成人员伤亡，但将泥浆搅拌棚砸坏。项目经理组织人员清理现场，并开展事故调查分析，对分包方进行罚款处理，调查报告完成后，经项目经理签字，上报了企业负责安全的部门。事件三：受钻孔机械故障影响，项目部要求甲公司增加钻孔机械，以保障钻孔作业的计划进度。因甲公司钻机在其他工地，需等5d后才能运到现场，等到该桥全部钻孔桩完成时已拖延工期13d。问题： 背景中选用反循环钻机成孔，则此处钻孔灌注桩作业的地层条件可能是什么样的？
Hitchhiking(搭车旅游) When I was in my teens(十几岁)and 20s,hitchhiking was a main form of long-distance transport.The kindness or curiosity of strangers（51）me all over Europe,North America,Asia and southern Africa.Some of the lift-givers became friends,many provided hospitality（52）the road. Not only did you find out much more about a country than（53）traveling by train or plane,but also there was that element of excitement about where you would finish up that night.Hitchhiking featured importantly in Western culture.It has books and songs about it.So what has happened to （54） A few years ago,I asked the same question about hitchhiking in a column on a newspaper.（55）of people from all over the world responded with their view on the state of hitchhiking. “If there is a hitchhiker’s （56）it must be lran,”came one reply.Rural lreland was recommended as a friendly place for hitchhiking,（57）was Quebec,Canada-“if you don’t mind being berated(严厉指责)for not speaking French.” But while hitchhiking was clearly still alive and well in many parts of the world,the （58）feeling was that throughout much of the west it was doomed(消亡). With so much news about crime in the media,people assumed that anyone on the open road without the money for even a bus ticket must present a danger.But do we（59）to be so wary both to hitchhike and to give a lift In Poland in the 1960s,（60）a Polish woman who e-mailed me,“the authorities introduced the Hitchhiker’s Booklet.The booklet contained coupons for drivers,so each time a driver（61）somebody,he or she received a coupon.At the end of the season,（62）who had picked up the most hikers were rewarded with various prizes.Everybody was hitchhiking then.” Surely this is a good idea for society.Hitchhiking would increase respect by breaking down（63）between strangers.It would help fight（64）warming by cutting down on fuel consumption as hitchhikers would be using existing fuels.It would also improve eductional standards by delivering instant（65）in geography,history,politics and sociology. 65（）
（四）背景资料某政府机关在城市繁华地段建一幢办公楼。在施工招标文件的附件中要求投标人具有垫资能力，并写明：投标人承诺垫资每增加500 万元的，评标增加1 分。某施工总承包单位中标后，因设计发生重大变化，需要重新办理审批手续。为了不影响按期开工，建设单位要求施工总承包单位按照设计单位修改后的草图先行开工。施工中发生了以下事件：事件一：施工总承包单位的项目经理在开工后又担任了另一个工程的项目经理，于是项目经理委托执行经理代替其负责本工程的日常管理工作，建设单位对此提出异议；事件二：施工总承包单位以包工包料的形式将全部结构工程分包给劳务公司；事件三：在底板结构混凝土浇筑过程中，为了不影响工期，施工总承包单位在连夜施工的同时，向当地行政主管部门报送了夜间施工许可申请，并对附近居民进行公告；事件四：为便于底板混凝土浇筑施工，基坑四周未设临边防护；由于现场架设灯具照明不够，工人从配电箱中接出220V 电源，使用行灯照明进行施工。为了分解垫资压力，施工总承包单位与劳务公司的分包合同中写明： 建设单位向总包单位支付工程款后，总包单位才向分包单位付款，分包单位不得以此要求总包位承担逾期付款的违约责任。 为了强化分包单位的质量安全责任，总分包双方还在补充协议中约定，分包单位出现质量安全问题，总包单位不承担任何法律责任，全部由分包单位自己承担。问题 建设单位招标文件是否妥当？说明理由。
某城市跨线立交桥工程，桥梁全长811m，共计24跨，桥梁下部结构有22根直径1.5m的钻孔灌注桩，采用反循环钻机成孔。项目部针对钻孔桩数量多，经招标程序将钻孔作业分项工程分包给甲机械施工公司，由甲公司负责组织钻孔机械进行钻孔作业。施工过程中现场发生如下事件：事件一：项目部在现场文明施工检查时发现：原有泥浆沉淀池已淤积，正在进行钻孔施工的泥浆水沿排水沟直接流到工地附近的河道里，现场土堆旁有未燃尽的油毡碎片。事件二：甲公司液压起重机起吊钢筋笼时，因钢筋笼的U形吊环与主筋焊接不牢，起吊过程中钢筋笼倾倒，所幸作业人员及时避开，没有造成人员伤亡，但将泥浆搅拌棚砸坏。项目经理组织人员清理现场，并开展事故调查分析，对分包方进行罚款处理，调查报告完成后，经项目经理签字，上报了企业负责安全的部门。事件三：受钻孔机械故障影响，项目部要求甲公司增加钻孔机械，以保障钻孔作业的计划进度。因甲公司钻机在其他工地，需等5d后才能运到现场，等到该桥全部钻孔桩完成时已拖延工期13d。问题： 事件二的事故处理程序是否妥当？如果不妥当，写出正确做法。
微信支付 
支付宝支付