在2008年8月16日,牙买加选手尤塞恩-博尔特在国家体育场“鸟巢”进行的北京奥

题型:填空题

问题:

在2008年8月16日,牙买加选手尤塞恩-博尔特在国家体育场“鸟巢”进行的北京奥运会男子100米决赛中以9秒69的成绩夺得金牌并打破9秒72的世界纪录。设高度为H的博尔特正在进行100m短跑就要到达比赛的终点处,有一摄影记者用照相机拍摄下了运动员冲刺的一幕。已知摄影记者使用的照相机的光圈(控制进光量的多少)是16,快门(曝光时间)是s,得到照片后测得照片中人高度为h,胸前号码布上模糊部分的宽度是ΔL。则由以上数据可以知道牙买加选手尤塞恩-博尔特100米决赛冲刺时s内的位移大小为____________,冲刺速度约为______________。

考点:平均速度和瞬时速度的区别
题型:填空题

小惠每次做作业遇到难题时,就向同学请教,或父母代劳。这说明[ ]

A、小惠学习依赖性太强,不能独立思考

B、小惠学习方法得当,节约时间,学习效率高

C、小惠与同学关系融洽,容易得到帮助

D、小惠是一名不耻下问的好学生

题型:填空题

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Are you truly happy? Do you ever know what it means to be happy and what it takes to achieve happiness?   1 . The following are a few tips that I follow to create happiness in my life.

◆Make a plan for attaining goals that you believe will make you happy. Your moods will very likely increase if you are going after something you value.

◆Surround yourself with happy people. It is easy to begin to think negatively when you are surrounded by people who think that way.   2 .

◆When something goes wrong, try to figure out a solution instead of being absorbed in self pity. Truly happy people don’t allow setbacks to affect their mood because they know that with a little thought they can turn the circumstances back to their favor.

  3 . These few minutes will give you the opportunity to focus on the positive things in your life and will lead you to continuous happiness.

  4 . Whether you treat yourself to lunch, take a long relaxing bath or simply spend a few extra minutes on your appearance, you will be subconsciously(下意识)putting yourself in a better mood.

◆Finding the humor in situations can also lead to happiness. Find a way to make light of a situation that would otherwise make you happy.

◆Keeping healthy is another way to achieve happiness.   5  

A.What makes one person happy may be very different from what makes someone else happy.

B.On the contrary, if you are around people who are happy, their emotional state will be infectious.

C.Being overweight or not eating nutritious foods can have a negative effect on your mood.

D.These are important questions for anyone who is seeking happiness to ask themselves.E. Spend a few minutes each day thinking about the things that make you happy.

F. There are some tips in life that lead to happiness.

G. It’s also important to take some time each day to do something nice for yourself.

题型:填空题

二尖瓣狭窄心脏病患者早期X线表现()。

A.左心室增大

B.左心房增大

C.右心室增大

D.右心房增大

E.主动脉增宽、扭曲

题型:填空题

在代理买卖业务中,证券公司应遵循的合法原则是指证券公司在开展证券经纪业务时要做到资料、委托价格、成交情况的公开,操作程序、交易结果公平、公正。( )

题型:填空题

2010年7月2日电:据中央电视台报道,中 * * 政治局今天召开会议,决定2010年10月在北京召开中 * * 党第十七届中央委员会第五次全体会议,会议指出“切实保障和改善民生,巩固和扩大应对国际金融危机冲击成果,促进经济长期平稳较快发展。”这一指示精神与下列哪一中国古代思想相一致()

A.“礼之胜,和为贵”

B.“仁人无敌于天下”

C.“民为贵,社稷次之,君为轻”

D.“养心莫善于寡欲”

更多题库