《2022年初中数学经典易错题集锦及答案 2.pdf》由会员分享，可在线阅读，更多相关《2022年初中数学经典易错题集锦及答案 2.pdf（8页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、regulations and other requirements of a relevant State laws, statutes, ordinances and norms; B of Luoyang City, Henan province , loca l regulations and departments under the State Council regulations, procedures; national, industry, standardization of Luoyang City, He nan province, about security ma
2、nagement laws, regulations, procedures, rule s, standards and other requirements; C national, trade and l ocal standards; D notification of a uthorities, law enforcement agencies, bulletins, and other requirements; E National Convention. 2, access to a superior communications, zhuanwen; B-published
3、newspapers, magazines; C conference access; D from laws, regulations, standards and other requirements distribution obtai ned; E by government agencies, industry associations and other acce ss; F sear ch t he Internet; G other channels. 3, recognition and i dentification 3.1 health and technology ac
4、cording to the standardization of safety management system requirements and related departments and units to coll ect information and preparation of GM of the applicable laws, regulations . 3, about the safety of jurisdi ctions, report regularly to the leading group for safety production. 4, promptl
5、y report accidents, and collaborative leadershi p group company safety production accidents, maintenance of the scene of the accident, and timely rescue of casualties to stop development. Four, duty firefighter responsibilities 1, accept the security of working arrangements, is in charge of work saf
6、ety in ea ch specifi c region. 2, organized by the security officer for conducting regular fire drills to ensure that basic firefighting skills. 3, make regular checks on production safety organized by the safety officer, found safety hazards immediately halted and proper precautionary measures, rep
7、orted to the safety officer. 4 assist the security officer is responsible for the work at the scene of the accident. Five, employee safety responsibilities 1 knowledge of pr oduction safety, and actively participate in the Organization of learning activities to enhance security awareness and conscio
8、usness. 2, strictly in a ccordance wit h the rules work, observe labour discipline and the rules and regulations of the company. 3, the correct use of PPE. 4, company officials in a timely manner to reflect problems in safety. Fourth chapter security meeting company set up a sound system of safety m
9、eetings, monthly summary all departments require a safety, regular analysis of the situation of production safety measures on major safety issues, and implementation. Safety training for the fifth chapter 1, all employees must receive safety training and education. 2, the company must be made before
10、 the new staff workshop, safety education. Employees changing jobs within the company or who leave for more than six months back to work, shop or safety education should accordingly. 3, for all employees of the company must conduct safety training and education, should be according to safety regulat
11、ions, safety rules, discipline as a n important part of safety education. 4, the companys special operations personnel (including electrician, driving motor vehicle s in factories, machine operators, and so on) must receive relevant professional training in safety knowledge, ensure qualified before
12、they can schedule posts. Sixth chapter safety checks, companies must establish and improve the system of safety checks. Workshop safety checks once a month, team leader safety checks once a week. Second, companies should organize production status check s, routine security che cks, professional safe
13、ty check. Spe cific requirements are: (I), post security, mainly by the staff before the operation, a bout your job or the work to be undertaken, and after confirming the safe and reliable operation. Contents incl ude: 1, if the security status of the equi pment i n good condition, safety protection
14、 device is effective; 2, provided security measures are implemented; 3, the equipment used, whether the tools i n accor dance with safety regulations; 4, job sites, as well as goods piled up compli ance with the safety specifications; 5, personal protective equipment, appliances, complete and reliab
15、le; 6, operation, procedures are clear. (B) routine safety inspections, mainly by the heads of the various departments responsible for, it must further site visits and inspections . .1, employee injuries that occur in the pr oce ss of work, must be strictly in accordance with the regulations of the
16、company reporti ng, investigation, a nalysis, treatment and management. 2, after a fatal accidents of workers, company officials shoul d immediately organize to save the victims, take effective measures to prevent the expansion and protection of the scene of the accident, rehabilitation efforts and
17、report group. Tenth chapter by-laws of the system come into force on the date of promulgation. Six, a security safeguard system and objective: costs for necessary in order to ensure the safety of production, ensure enterprise se curity investment funds and improved working conditions, according to t
18、he extraction of determines the criteria yourself, and have the courage to produce shall not be diverted to any other use. Second, scope this poli cy applies to the funds of input in production safety management. Three, responsibilities 1, Chairman of the Board is responsible for determining safety
19、extraction of investment criteria and the funding necessary to ensure the safety of production. 2, car bon susheng technology is responsi ble for the development of the system of safety investment to protect, supe rvise and inspect the use of investment funds to security. 3, finance charge based on
20、the safety investment protection system, establishi ng the security expense account records the cost of extraction and the use of security costs. Four, according to the financi al management of the high-risk industry enterprise safety in production costs of the interim measures (financial enterprise
21、s, No. 478) requirements, combined with the actual situation in enterprise security costs that year extraction is base d on actual sales of the year for accrual basis, using excess regressive manner, according to extracts to cut 2. 1, annual sales income in part up to 10 million Yuan, according to t
22、he extract to cut 4. 2, annual sales income in the 10 million Yuan to 100 million Yuan (included) parts, extract to cut by 2. 3, the annual sales income of RMB 100 million to 1 billion yua n (included) parts, extract 0.5 per cent respectively. 4, part of the annual sales income of more than 1 billio
23、n yuan, according to the extract to cut 0.2. 5, and developed contains following aspects of safety costs of usi ng plans, a nd impl ementation: , and perfect, and transformation and maintenance se curity protecti on equi pment facilities spending, whi ch: security初中数学经典易错题集锦及答案一、选择题1、A、B 是数轴上原点两旁的点，
24、则它们表示的两个有理数是-（）A、互为相反数B、绝对值相等C、是符号不同的数D、都是负数2、有理数a、b 在数轴上的位置如图所示，则化简|a-b|-|a+b|的结果是 -（）A、2a B、2b C、2a-2b D、2a+b 3、轮船顺流航行时m 千米 /小时，逆流航行时(m-6)千米 /小时，则水流速度- （）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、无数个5、下列说法错误的是-（）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
25、 y=(m2-1)x2-(3m-1)x+2 的图象与x 轴的交点情况是- ( ) A.当 m3 时，有一个交点B、1m时，有两个交C、当1m时，有一个交点D、不论 m 为何值，均无交点7.如果两圆的半径分别为R 和 r（Rr） ，圆心距为d，且 (d-r)2=R2，则两圆的位置关系是- （）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 bac，则下列图形正确的是- （）A B C D9、有理数中，绝对值最小的数是-（）A、-1 B、1 C、0 D、不存在10、21的倒数的相反数是- （）A、-2 B、2 C、-21D、2111、若 |x
26、|=x，则 -x 一定是 - （）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，则这两个有理数为- （）A、互为相反数B、互为倒数C、互为相反数且不为0 D、有一个为0 13、长方形的周长为x，宽为 2，则这个长方形的面积为- （）A、2x B、2(x-2) C、x-4 D、2(x-2)/2 14、 “比 x 的相反数大3 的数”可表示为- - （）A、-x-3 B、-(x+3) C、3-x D、x+3 15、如果 0a0 时无解D、当 a0 时无解24、反比例函数xy2，当 x3 时， y 的取值范围是- （）A、y32B、y32C、y32或 y0
27、D、0y3225、0.4 的算术平方根是- （）A、0.2 B、 0.2 C、510D、51026、李明骑车上学，一开始以某一速度行驶，途中车子发生故障，只好停车修理，车修好后，因怕耽误时间，于时就加快了车速， 在下列给出的四个函数示意图象，符合以上情况的是- （）A B C D 27、若一数组x1, x2, x3, , xn的平均数为x，方差为s2，则另一数组kx1, kx2, kx3, , kxn的平均数与方差分别是（）A、kx, k2s2 B、x, s2 C、kx, ks2 D、k2x, ks228、若关于x 的方程21axx有解，则a 的取值范围是 - （）A、a 1 B、a-1 C、
28、 a2 D、a 1 29、下列图形中既是中心对称图形，又是轴对称图形的是- （）A、线段B、正三角形C、平行四边形D、等腰梯形30、已知dcba，下列各式中不成立的是- （）A、dcbadcbaB、dbcadc33C、bdacba23D、ad=bc 31、一个三角形的三个内角不相等，则它的最小角不大于- （）OOOO精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 2 页，共 8 页A、300 B、450 C、550D、60032、已知三角形内的一个点到它的三边距离相等，那么这个点是- （）A、三角形的外心B、三角形的重心C、三角形的内心D、三角形的
29、垂心33、下列三角形中是直角三角形的个数有- （）三边长分别为3:1:2 的三角形三边长之比为1:2:3 的三角形三个内角的度数之比为3:4:5 的三角形 一边上的中线等于该边一半的三角形A、1 个B、2 个C、3 个D、4 个34、如图，设AB=1，SOAB=43cm2，则弧 AB 长为 - - （）A、3cm B、32cm C、6cm D、2cm 35、平行四边形的一边长为5cm，则它的两条对角线长可以是- （）A、4cm, 6cm B、4cm, 3cm C、2cm, 12cm D、4cm, 8cm 36、如图， ABC 与 BDE 都是正三角形，且ABCD C、AECD D、无法确定37
30、、顺次连结四边形各边中点得到一个菱形，则原四边形必是- （）A、矩形B、梯形C、两条对角线互相垂直的四边形D、两条对角线相等的四边形38、在圆 O 中，弧 AB=2CD ，那么弦AB 和弦 CD 的关系是 - （）A、AB=2CD B、AB2CD C、AB2CD D、AB 与 CD 不可能相等39、在等边三角形ABC 外有一点D，满足 AD=AC ，则 BDC 的度数为 - （）A、300 B、600 C、1500 D、300或 150040、 ABC 的三边 a、b、c 满足 abc， ABC 的周长为18，则 - （）A、a6 B、b6 D、 a、b、c 中有一个等于6 41、如图，在AB
31、C 中， ACB=Rt ， AC=1 ，BC=2 ，则下列说法正确的是- （）A、 B=300 B、斜边上的中线长为1 C、斜边上的高线长为552D、该三角形外接圆的半径为1 42、如图，把直角三角形纸片沿过顶点B 的直线 BE（BE 交 CA 于 E）折叠，直角顶点C 落在斜边AB 上，如果折叠后得到等腰三角形EBA，那么下列结论中（1） A=300（2）点 C 与AB 的中点重合（3）点 E 到 AB 的距离等于CE 的长，正确的个数是-（）A、0 B、1 C、2 D、 3 43、不等式6322xx的解是 -（）A、x2B、x-2C、x2D、x-244、已知一元二次方程(m-1)x2-4m
32、x+4m-2=0有实数根，则m 的取值范围是 -（）A、m1 B、m31且 m1 C、m1 D、-10) 和 y=xk(k 0)，在同一坐标系中的图象可能是-（）A B C D OBAABDCEABCDEEABC精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 3 页，共 8 页regulations and other requirements of a relevant State laws, statutes, ordinances and norms; B of Luoyang City, Henan province , loca l re
33、gulations and department s under the State Council regulations, procedures; national, industry, standardization of Luoyang City, He nan province, about security management laws, regulations, procedures, rules, standards and other requirements; C national, trade and l ocal standards; D notification o
34、f a uthorities, law enforcement agencies, bulletins, and other requirements; E National Convention. 2, access to a superior communications, zhuanwen; B-published newspapers, magazines; C conference access; D from laws, regulations, standards and other requirements distribution obtai ned; E by govern
35、ment agencies, industry associations and other acce ss; F sear ch t he Internet; G other channels. 3, recognition and i dentification 3.1 health and technology according to the standardization of safety management system requirements and related departments and units to coll ect information and prep
36、aration of GM of the applicable laws, regulations . 3, about the safety of jurisdi ctions, report regularly to the leading group for safety production. 4, promptly report accidents, and collaborative leadershi p group company safety production accidents, maintenance of the scene of the accident, and
37、 timely rescue of casualties to stop development. Four, duty firefighter responsibilities 1, accept the security of working arrangements, is in charge of work safety in each specifi c region. 2, organized by the security officer for conducting regular fire drills to ensure that basic firefighting sk
38、ills. 3, make regular checks on production safety organized by the safety officer, found safety hazards immediately halted and proper precauti onary measures, reported to the safety officer. 4 assist the security officer is responsible for the work at the scene of the accident. Five, employee safety
39、 responsibilities 1 knowledge of pr oduction safety, and actively participate in the Organization of learning activities to enhance security awareness nd consciousness. 2, strictly in accorda nce wit h the rules work, observe labour discipline and the rules and regulations of the company. 3, the cor
40、rect use of PPE. 4, company officials in a timely manner to reflect problems in safety. Fourth chapter security meeting company set up a sound system of safety meetings, monthly summary all departments require a safety, regular analysis of the situation of production safety measures on major safety
41、issues, and implementation. Safety training for the fifth chapter 1, all employees must receive safety training and education. 2, the company must be made before the new staff workshop, safety education. Employees changing jobs within the compa ny or who leave for more than six months back to work,
42、shop or safety education should accordingly. 3, for all employees of the company must conduct safety training and education, should be according to safety regulations, safety rules, discipline as a n important part of safety education. 4,the companys special operations personnel (including electrici
43、an, driving motor vehicle s in factories, machine operators, and so on) must receive relevant professional training in safety knowledge, ensure qualified before they can schedule posts. Sixth chapter safety checks, companies must establish and improve the system of safety checks. Workshop safety che
44、cks once a month, team leader safety checks once a week. Second, companies should organize production status check s, routine security che cks, professional safety check. Spe cific requirements are: (I), post security, mainly by the staff before the operation, about your job or the work to be undert
45、aken, and after confirming the safe and reliable operation. Contents incl ude: 1, if the security status of the equi pment i n good condition, safety protection device is effective; 2, provided security measures are implemented; 3, the equipment used, whether the tools i n accor dance with safety re
46、gulations; 4, job sites, as well as goods piled up compli ance with the safety specifications; 5, personal protective equipment, appliances, complete and reliable; 6, operation, procedures are clear. (B) routine safety inspections, mainly by the heads of the various departments responsible for, it m
47、ust further site visits and inspections . .1, employee injuries that occur in the pr oce ss of work, must be strictly in accordance with the regulations of the company reporti ng, investigation, a nalysis, treatment and management. 2, after a fatal accidents of workers, company officials shoul d imm
48、ediately organize to save the victims, take effective measures to prevent the expansion and protection of the scene of the accident, rehabilitation efforts and report group. Tenth chapter by-laws of the system come into force on the date of promulgation. Six, a security safeguard system and objectiv
49、e: costs for necessary in order to ensure the safety of production, ensure enterprise se curity investment funds and improved worki ng conditions, according to the extraction of determines the criteria yourself, and have the courage to produce shall not be diverted to any other use. Second, scope th
50、is poli cy applies to the funds of input in production safety management. Three, responsibilities 1, Chairman of the Board is responsible for determining safety extraction of investment criteria and the funding necessary to ensure the safety of production. 2, car bon susheng technology is responsi b