初中数学经典易错题集锦及答案2

1、regulations and other requir ements of a relevant state laws, statutes, ordi nances and norms; b of luoyang city, he na n provi nce , loca l regulations a nd department s under the state council regulations, procedures; national, industr y, standardi zation of luoyang cit y, he nan province, a bout

2、security management laws, reg ulations, proce dures, r ule s, standards and other re quireme nts; c national, trade a nd l ocal sta ndar ds; d notificati on of a uthoritie s, law e nforceme nt agenci es, bulleti ns, and ot her requirements; e national conve ntion. 2, access to a superi or communicat

3、i ons, zhuanwen; b -publ ished newspapers, magazine s; c conference access; d from laws, regulati ons, standards and other re quireme nts distr ibuti on obtai ned; e by governme nt agencies, i ndustry associati ons and other a cce ss; f sear ch t he inter net; g ot her channels. 3, recogniti on a nd

4、 i dentificati on 3.1 healt h and technol ogy accordi ng to the sta ndar dization of safety management system re quireme nts and related departments a nd units t o coll ect informati on a nd pre paration of gm of the a ppli cable laws, reg ulations .3, about the safety of juri sdi ctions, report reg

5、ularly to t he leadi ng group for safety production. 4, pr omptly report accide nts, and collaborative leader shi p group company safety pr oduction accidents, mai ntena nce of the scene of the accide nt, and timely rescue of casualties t o stop devel opment. f our, duty firefighter responsi bilitie

6、s 1, accept the se curity of worki ng arrangeme nts, is in charge of work safety in ea ch specifi c region. 2, orga nized by the security officer for conducti ng regular fire drill s to ensure that basic firefighting skills. 3, make regular che cks on production safety organize d by t he safety offi

7、cer, found safety hazards immediately halted and proper pre cauti onary measures, re porte d to the safety officer. 4 assi st the se curity officer is responsibl e for the work at the sce ne of the accide nt. five, empl oyee safety responsi bilities 1 k nowle dge of pr oduction safety, a nd a ctivel

8、y pa rticipate in the organi zation of learni ng activities to enhance se curity aware ness a nd consciousne ss. 2, strictly in a ccorda nce wit h the r ules w ork, observe la bour discipli ne and the r ules a nd regulations of the compa ny. 3, the corre ct use of ppe. 4, com pany official s in a ti

9、mely manner to reflect problems i n safety. fourth chapter security meeting company set up a sound system of safety meetings, mont hly summary all de partments re quire a safety, regular a nalysis of the situati on of producti on safety measures on m ajor safety issues, and im plementati on. safety

10、training for the fifth cha pter 1, all empl oyees must re ceive safety traini ng and e ducation. 2, the com pany must be made before t he ne w staff workshop, safety educati on. employee s changi ng jobs withi n the compa ny or who leave for more tha n six months back to w ork, shop or safety educat

11、i on should a ccordingl y. 3, for all employee s of the company must conduct safety traini ng and educati on, should be accor ding to safety regulati ons, safety rules, discipli ne as a n importa nt part of safety education. 4,中学数学经典易错题集锦及答案一、挑选题1、a 、b 是数轴上原点两旁的点，就它们表示的两个有理数是-（）a 、互为相反数b、肯定值相等c、是符号不

12、同的数d 、都是负数2、有理数a、b 在数轴上的位置如下列图，就化简|a-b|-|a+b|的结果是 -（）a 、2ab、2bc、2a-2bd 、2a+bboa3、轮船顺流航行时m 千米 /小时，逆流航行时m-6 千米 /小时，就水流速度-（）a 、2 千米 /小时b 、3 千米 /小时c、6 千米 / 小时d、不能确定4、方程 2x+3y=20 的正整数解有 -（）a 、1 个b 、3 个c、4 个d、很多个 5、以下说法错误选项-（）a.两点确定一条直线b、线段是直线的一部分c、一条直线是一个平角d、把线段向两边延长即是直线 6.函数 y=m 2-1x 2 -3m-1x+2 的图象与x 轴的

13、交点情形是- a. 当 m 3 时，有一个交点b、 m1 时，有两个交c、当 m1 时，有一个交点d 、不论 m 为何值，均无交点7.假如两圆的半径分别为r 和 r（ r>r ），圆心距为d，且 d-r 2 =r2，就两圆的位置关系是- （）a 、内切b 、外切c、内切或外切d、不能确定 8、在数轴上表示有理数a、b、c 的小点分别是a 、b、c 且 b<a<c，就以下图形正确选项- （）abccbacabbabcacd9、有理数中，肯定值最小的数是-（）a 、-1b 、1c、0d 、不存在1 的倒数的相反数是-（）10、2a 、-2b、2c、- 1d、 12211、如 |x

14、|=x ，就 -x 肯定是 -（）a 、正数b 、非负数c、负数d、非正数 12、两个有理数的和除以这两个有理数的积，其商为0，就这两个有理数为-（） a 、互为相反数b、互为倒数c、互为相反数且不为0d、有一个为0 13、长方形的周长为x ，宽为 2，就这个长方形的面积为-（）a 、2xb 、2x-2c、x-4d 、2· x-2/2 14、“比 x 的相反数大3 的数”可表示为-（）a 、-x-3b 、-x+3c、3-xd、x+3 15、假如 0<a<1 ，那么以下说法正确选项-v-（）a 、a2 比 a 大b、a2 比 a 小c、 a2 与 a 相等d 、a2 与 a

15、 的大小不能确定 16、数轴上， a 点表示 -1，现在 a 开头移动，先向左移动3 个单位，再向右移动9 个单位，又向左移动5 个单位，这时， a 点表示的数是-（）a 、-1b、0c、1d 、8 17、线段 ab=4cm ，延长 ab 到 c，使 bc=ab再延长 ba 到 d ，使 ad=ab ，就线段 cd 的长为 -（）a 、12cmb 、10cmc、8cmd 、4cm18、 12 的相反数是 -（）the com pany's spe cial operations per sonnel including el ectrici an, driving motor ve h

16、icle s in factori es, machine operat ors, and so on must re ceive relevant professi onal trai ning in safety knowle dge, ensure qualifie d before t hey can schedule posts. sixth cha pter safety checks, companies m ust establ ish and improve t he system of safety che cks. workshop safety checks once

17、a mont h, team leader safety che cks once a w eek. second, compa nies should organize producti on stat us check s, routi ne se curity che cks, professi onal safety che ck. spe cific requirements ar e: i, post security, mainly by the staff before the operati on, a bout your job or t he work to be und

18、ertaken, and after confirming the safe and relia ble operation. contents i nclude: 1, if the secur ity status of the e qui pment i n good condition, safety protecti on device is effective; 2, provide d se curity measures are impl emented; 3, the equipment use d, whet her the t ools i n accor dance w

19、ith safety regulations; 4, job sites, as wel l as goods piled up compli ance with the safety spe cifications; 5, per sonal prote ctive equipme nt, appliances, complete and reliable ; 6, operation, pr oce dures are clear. b routine safety inspecti ons, mainly by the heads of the various department s

20、responsible for, it must furthersite visits and inspe ctions . .1, employ ee injuries that occur in t he pr oce ss of work, m ust be stri ctly in accor dance wit h the regulati ons of the company re porti ng, investigati on, a nalysis, treatment and ma nagement. 2, after a fatal accide nts of worker

21、s, company officials shoul d immediately organi ze to save the victims, take effective measures toprevent the ex pansion and prote ction of the scene of the accident, reha bilitati on efforts and report group.tenth chapter by -laws of the system come i nto force on the date of pr omulgation. six, a

22、se curity safeguar d system and obje ctive: costs for necessary in order to e nsure the safety of production, ensure e nterpri se se curity investme nt funds and improve d worki ng conditi ons, accor ding to the extraction of determine s the criteria your self, and have t he courage to produce sha l

23、l not be diverte d to any ot her use. second, scope this poli cy applies to t he funds of input i n production safety management. t hree, responsi bilitie s 1, chairman of the board is responsi ble for determi ning safety extraction of investment criteria and the fundi ng ne cessary to ensure the sa

24、fety of producti on. 2, car bon sushe ng technol ogy is re sponsi ble for the development of the system of safety investment to protect, supe rvise and inspe ct the use of inve stment funds to se curit y. 3, fina nce charge base d on the safety investme nt prote ction sy stem, establi shi ng the se

25、curity expense account records t he cost of extraction and t he use of se curity costs. four, a ccordi ng to the fina nci al management of the high-risk i ndustry enterpri se safety in pr oducti on costs of the interim measure s financi al enter prises, no. 478 requireme nts, combi ned wit h the a c

26、tual sit uation in e nterprise security costs that year extraction isbased on a ctual sales of the year for accr ual ba sis, using exce ss regressive manner, a ccording t o extracts to cut 2. 1, annual sales income in part up to 10 million yuan, accordi ng to the extract to cut 4. 2, annual sales in

27、come i n the 10 million yuan t o 100 milli on yuan included parts, extract to cut by 2. 3, the a nnual sale s income of rm b 100 milli on to 1 billi on yua n incl uded parts, extract 0.5 pe r cent respectivel y. 4, part of the annual sales i ncome of more than 1 billi on yuan, a ccording t o the ext

28、ract to cut 0.2. 5, and deve loped contai ns following aspe cts of safety cost s of usi ng pla ns, a nd impl ementation: , and perfect, and transformation and mainte nance se curity pr otecti on e qui pme nt facilities spending , whi ch: securityregulations and other requir ements of a relevant stat

29、e laws, statutes, ordi nances and norms; b of luoyang city, he na n provi nce , loca l regulations a nd departm ent s under the state council regulations, procedures; national, industr y, standardi zation of luoyang cit y, he nan province, a bout security management laws, reg ulations, proce dure s,

30、 rule s, standards and other re quireme nts; c national, trade a nd l ocal sta ndar ds; d notificati on of a uthoritie s, law e nforceme nt agenci es, bulleti ns, and ot her requirements; e national conve ntion. 2, access to a superi or communicati ons, zhuanwen; b-publ ished newspapers, magazine s;

31、 c conference access; d from laws, regulati ons, standards and other re quireme nts distr ibuti on obtai ned; e by governme nt agencies, i ndustry associati ons and other a cce ss; f sear ch t he inter net; g ot her channels. 3, recogniti on a nd i dentificati on 3.1 healt h and technol ogy accordi

32、ng to the sta ndar dization of safety management system re quireme nts and related departments a nd units t o coll ect informati on a nd pre paration of gm of the a ppli cable laws, reg ulations .3, about the safety of juri sdi ctions, report regularly to t he leadi ng group for safety production. 4

33、, pr omptly report accide nts, and collaborative leader shi p group company safety pr oduction accidents, mai ntena nce of the scene of th e accide nt, and timely rescue of casualties t o stop devel opment. f our, duty firefighter responsi bilities 1, accept the se curity of worki ng arrangeme nts,

34、is in charge of work safety in ea ch specifi c region. 2, orga nized by the security officer for conducti ng regular fire drill s to ensure that basic firefighting skills. 3, make regular che cks on production safety organize d by t he safety officer, found safety hazards immediately halted and prop

35、er pre cauti onary measures, re porte d to the safety officer. 4 assist the se curity officer is responsibl e for the work at the sce ne of the accide nt. five, empl oyee safety responsi bilities 1 k nowle dge of pr oduction safety, a nd a ctively pa rticipate in the organi zation of learni ng activ

36、ities to enhance se curity aware ness nd consciousne ss. 2, strictly in a ccorda nce wit h the r ules w ork, observe la bour discipli ne and the r ules a nd regulations of the c ompa ny. 3, the corre ct use of ppe. 4, com pany official s in a timely manner to reflect problems i n safety. fourth chapter security meeting company set up a sound system of safety meetings, mont hly summary all de partments re quire a safety, regular a nalysis of the situati on of producti on safety measures on major safety issues, and im plementati on. safety training for the