《煤矿安全规程》规定采掘工作面回风流中CO2的浓度不得超过（）%。A、1.0B、1. 发布时间：2017-08-30 07:02 │ 来源：www.tikuol.com 题型：单项选择题 问题： 《煤矿安全规程》规定采掘工作面回风流中CO2的浓度不得超过（）%。A、1.0B、1.5C、0.5D、0.75
题型：单项选择题 By 16:30, ______was almost closing time, nearly all the paintings had been sold.A．whichB．whenC．whatD．that 查看答案
题型：单项选择题 以下关于计算机网络拓扑的讨论中，哪一个观点是错误的 ______。A．计算机网络拓扑通过网中结点与通信线路之间的几何关系表示网络结构 B．计算机网络拓扑反映出网络中各实体间的结构关系 C．拓扑设计是建设计算机网络的第一步，也是实现各种网络协议的基础 D．计算机网络拓扑反映出网络中客户/服务器的结构关系 查看答案
题型：单项选择题 小明同学在复习历史时，写下了下图所示的笔记。据此判断，其复习主题应是A．新中国依法治国方略的制定B．中国社会主义制度基本建立C．新中国民主政治制度的建设D．中国特色社会主义理论形成 查看答案
题型：单项选择题 完形填空。 I once had a teacher whose husband died suddenly of heart attack.About a week after his death,she__1__some of her thoughts with a classroom of students.As the late afternoon sunlight shone__2__the classroom windows,and when the class was nearly over,she__3__a few things aside on the edge of her desk and sat down. With a__4__look on her face,she paused and said,"__5__class is over,I'd like to share with all of you a deep__6__which I feel is very important.Each of us is put here on__7__to learn,share,love,appreciate and give of ourselves.__8__of us knows when this fantastic experience will__9__.It can be taken away at any moment.Perhaps this is the God's__10__of telling us that we must make the__11__of every single day." Her eyes were beginning to__12__,but she went on,"So I would like you all to make me a__13__:From now on,on your way to school,or on your way home,find something beautiful to__14__.It doesn't have to be something you see.It could be a__15__of freshly baked bread floating out of someone's house,or it could be the sound of the soft__16__rustling ( 使发出沙沙声) the leaves in the trees...Please look for these things,and__17__them,for at anytime they can all be taken away..."The class was completely__18__.We all picked up our books and went out of the room silently.That__19__,I observed many more beautiful things on my way home from school than usual. Remember:Life is not__20__by the number of breaths we take,but by the moments that take our breath away.( )1. A.learned ( )2．A.onto ( )3．A.moved ( )4．A.surprised ( )5．A.After ( )6．A.feeling ( )7．A.business ( )8．A.None ( )9．A.happen ( )10．A.way ( )11．A.least ( )12. A.ache ( )13．A.promise ( )14．A.buy ( )15．A.smell ( )16．A.wind ( )17．A.get ( )18．A.puzzled ( )19．A.morning ( )20．A.wasted B．shared B．into B．brushed B．worried B．Unless B．understandingB．time B．All B．begin B．signal B．worst B．water B．choice B．enjoy B．gift B．hand B．appreciate B．excited B．night B．measured C．argued C．across C．swept C．gentle C．Before C．love C．duty C．Each C．end C．plan C．lowest C．shine C．wish C．take C．taste C．light C．hide C．quiet C．noon C．saved D．discussed D．through D．pulled D．strange D．If D．memory D．earth D．Neither D．gain D．arrangement D．most D．dry D．rule D．learn D．sight D．color D．follow D．anxious D．afternoon D．lost 查看答案
