如图所示，某物体沿两个半径为R 的圆弧由A经B到C，下列结论正确的是（） A． 发布时间：2017-04-22 09:43 │ 来源：www.tikuol.com 题型：选择题 问题： 如图所示，某物体沿两个半径为R 的圆弧由A经B到C，下列结论正确的是（ ）A．物体的位移等于4R，方向向东B．物体的位移等于2πRC．物体的路程等于4R，方向向东D．物体的路程等于4πR
题型：选择题 某公司组织部分职工参加电脑网络培训，按原定的人数估计共需费用3000元，后因人数增加到原定的2倍，费用享受了优惠，一共需要4800元，参加活动的每个职工平均分摊的费用比原计划费用少40元，原定的人数是多少？ 查看答案
题型：选择题 完形填空。 The ringing of the phone runs through my head,telling me someone needs help．I pick it up and __1__ the routine,"Teen Lifeline,this is Amber．" About 45 minutes later I hang up,feeling pleased because I've __2__ another teen．Volunteering at Teen Lifeline has helped me realize how to deal with my own __3__ and help others． "My mom is always fighting with me．I want to run away．" Some teens feel their __4__ is a prison,rather than a place of shelter and safety．They feel parents are only there to make their lives __5___．We try to help the teens realize the danger they could be in __6__ giving them advice．All we can do is to ask questions．We also try to__7__ where the teens would go and how they would survive．We give them a phone number if they __8__ don't want to live in their "prison"． "I don't want to __9__ any more" is something we hear,and suicide (自杀) calls are some of the hardest to __10__．We try to discover why they want to take their lives and how __11__ they are by asking them to rate it on a scale of one to ten．One means they are __12__ suicide but haven't decided how,and ten means they are always thinking about it and have a __13__．We ask them to make a promise that they will not hurt __14__．And sometimes we ask for their telephone numbers __15__ we can call back to make sure that they are okay． Although many calls are about relatively __16__ problems,volunteering at Teen Lifeline has helped me realize I'm not the __17__ person with problems,and has taught me how to __18__ with my heart．I have made a __19__ and saved many lives-possibly even my own,__20__．( )1．A．set ( )2．A．contacted ( )3．A．decisions ( )4．A．home ( )5．A．simple ( )6．A．for ( )7．A．insist on ( )8．A．even ( )9．A．study ( )10．A．carry out ( )11．A．serious ( )12．A．accepting ( )13．A．question ( )14．A．the other ( )15．A．in case ( )16．A．small ( )17．A．very ( )18．A．listen ( )19．A．decision ( )20．A．however B．start B．known B．opinions B．school B．unusual B．by B．advise on B．still B．live B．find out B．curious B．objecting B．doubt B．the rest B．so that B．important B．only B．see B．choice B．though C．change C．helped C．disadvantagesC．bedroom C．terrible C．besides C．find out C．almost C．call C．believe in C．nervous C．considering C．purpose C．themselves C．if C．normal C．exact C．learn C．promise C．instead D．stop D．forgiven D．problems D．classroom D．happy D．without D．set aside D．mostly D．listen D．deal with D．ashamed D．performing D．plan D．ourselves D．when D．typic al D．possible D．write D．difference D．too 查看答案
