用科学记数法表示13040000应记作______，若保留3个有效数字，则近似值

发布时间：2017-05-08 18:04 │ 来源：www.tikuol.com

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用科学记数法表示13040000应记作______，若保留3个有效数字，则近似值为______．

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完形填空。
Many people think the more time is spent,the more work will be done.So students have to spend the whole_ 1 doing school except the three meals.It is _ 2 _to see students struggling( 挣扎)in a sea of school work both at school and at home. Modern students usually have many_ 3 _.They love music and sports.They like reading and watching TV.A _ 4 _weekend can get them_ 5 __from too much school work, and they can do what they like. __6_still teachers do not think about it .__7__they have too much school work,they have -__8__to enjoy themselves.Students are really tired of their weekend homework.So they usually don’t do their homework___9_Sunday night.And there is not enough time but much work,students have to finish it carelessly.The __10__weekend homework makes teachers angry. Things always get __11 _without right ideas.Too much school work makes students lose interest(兴趣)in learning.It’s also bad for_ 12__. A horse runs faster after a__13__.But for students only rest is not enough is .So such a condition(学习的氛围)should be __14 _to give students both pleasure and knowledge. Please give students __15__homework but leave them free time.
( )1 A.day ( )2 A.never ( )3 A.books ( )4 A.two days ( )5 A.busy ( )6 A.And ( )7 A.For ( )8 A.more time ( )9 A.until ( )10 A.good ( )11 A.better ( )12 A.our health ( )13 A.minute ( )14 A.kept ( )15 A.less…less	B. morning B. common (普遍的) B. interests B. two_day B. pleased B. Also B. With B. few time B. when B. poor B. afraid B. your health B. moment B. changed B. more…more	C. afternoon C. glad C. spor ts C. two day C. away C. But C. Though C. no time C. at C. careful C. worse C. their health C. meal C. same C. more…less	D. weekend D. hardly D. friends D. two_days D. tired D. Always D. Because D. times D. on. D. happy D. wonderful D. you health D. rest D. different D. less...more

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婴幼儿肌内注射的最佳部位是（）。

A.臀大肌

B.臀中肌

C.三角肌

D.臀小肌

E.腹壁肌

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下面基于关系数据库系统的，以数据处理为主的传统的数据库应用所具有的特征的叙述，比较全面的是()。　　Ⅰ．结构统一　　Ⅱ．面向记录　　Ⅲ．数据项小　　Ⅳ．原子字段

A．Ⅰ，Ⅱ和Ⅲ

B．Ⅱ，Ⅲ和Ⅳ

C．Ⅰ，Ⅲ和Ⅳ

D．Ⅰ，Ⅱ，Ⅲ和Ⅳ

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北京2008年第29届奥运会吉祥物“福娃”表明了[ ]

①和平与发展仍是当今时代的主题，是不可阻挡的历史潮流

②我国保护环境的基本国策

③中国传统文化与现代奥林匹克精神的完美结合

④中国人对自然、对世界各国人民和谐相处的愿望

A、①②

B、②③

C、①②③④

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（一）　　材料一：在某市一条不足400米长的步行街上，清洁工人清理出人们吐掉的口香糖约15公斤。某市公交公司无人售票公共汽车3年间收到的残币假钞竟高达50万元。一孕妇在参加公务员录用考试后上了专门接送考生的大客车，全车考生没有一个人给她让座。　　材料二：在对某市市民社会公德现状的一次调查中，99%的受访者认为不应该随地吐痰，但真正吐到手纸扔到垃圾箱里的不足50％；雨季商店为顾客准备的文明伞，表示用完后及时归还的占受访者的81％，但下雨过后，商店真正回收的雨伞仅占发放的10％；人人皆知本市严重缺水，但公共用水的浪费却十分惊人。

上述材料反映的现象说明（）。

A．部分公众缺乏基本的公德意识

B．一些公众了解相应的公德规范，但在实践中却不作为

C．对违反社会公德的现象和行为，没有形成人人谴责的舆论氛围

D．现行的行政和法律措施，助长了公德缺失现象的滋生与蔓延

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