七年级上学期期末练习
人教版七年级上学期数学《期末测试卷》及答案

3.某书上有一道解方程的题: +1=x,□处在印刷时被油墨盖住了,查后面的答案知这个方程的解是x=-2,那么□处应该是数字( )
A.7B.-10C.2D.-2
4.下列说法正确的是()
A. 近似数24.00与24.0的精确度一样
B. 近似数100万精确到万位
二.填空题:(每空3分,共244分)
13.如图,D是AB上一点,CE∥BD,CB∥ED,EA⊥BA于点A,若∠ABC=38°,则∠AED=____.
14.如图,如果AB∥CD,CD∥EF,∠1=36°, ∠2=76°那么∠BCE等于____________
15.已知线段AB=6cm,点C在直线AB上,且CA=4cm,O是AB的中点,则线段OC的长度是_____cm.
(1)若两车同时相向而行,则几小时后相遇?
(2)若两车同时相向而行,则几小时后相距84千米?
(3)若两车同时反向而行,则几小时后相距672千米?
24.如图:已知△ABC与△DEF是一副三角板的拼图,A,E,C,D在同一条线上
(1)求证EF∥BC;
(2)求∠1与∠2的度数.
25.为了庆祝商都正式营业,商都推出了两种购物方案,方案一:非会员购物所有商品价格可获得九五折优惠:方案二:如交纳300元会费成为该商都会员,则所有商品价格可获九折优惠.
6.多项式a3-4a2b2+3ab-1的项数与次数分别是( )
A.3和4B.4和4C.3和3D.4和3
[答案]B
[解析]
[分析]
多项式中每个单项式叫做多项式的项,这些单项式中的最高次数,就是这个多项式的次数,根据这个定义即可判定.
[详解]解:多项式a3-4a2b2+3ab-1的项有:a3、-4a2b2、3ab、-1,共4项,所以项数为4;
2022-2023学年度第一学期七年级语文期末综合练习(考前热身)(含答案)

2022-2023学年度第一学期七年级语文期末考前热身一、积累与运用(30分)L根据课文默写(7分)(1)僵卧孤村不自哀,。
(2),崔九堂前几度闻。
(3),思而不学则殆。
(4)不知何处吹芦管,o(5)夜发清溪向三峡,。
(6)《诫子书》中有两句话常被人们是:,(出自《十一月四日风雨大作》)(《江南逢李龟年》)(《论语十二章》)(李益《夜上受降城闻笛》)(李自《峨眉山月歌》当作“志存高远”的座右铭,这两句话2.根据拼音写汉字或给加点字注音。
(6分)静mi ()安xidng ()余hui ()羞性()螃()伏感kGi ().下列说法有误的一项是()(2分)A.《动物笑谈》一文的作者是英国动物行为学家、科普作家康拉德•劳伦兹。
其代表作是《所罗门王的指环》。
B.《狼》选自文言小说集《聊新志异》。
作者蒲松龄,字留仙,世称聊斋先生,清代文学家。
C. “聊斋”是蒲松龄的书房名,“志”意思是记述,“异”指的是奇异的故事,《聊斋志异》这本书虽然写的多是鬼怪故事,却曲折地反映了当时广阔的现实生活。
I).《猫》一文表达了“我”对第三只猫的内疚以及内心的痛苦和自责之情。
4.下列句子中,没有语病的一项是()(2分)A.这最后一天的番禺区中小学足球比赛是开赛以来最激烈、最精彩的一天。
B.读整本书,不仅可以练习精读、速读,还有利于养成好的读书习惯。
C.通过个区中小学生诗词大赛的成功举办,使社会上掀起了诵读诗词的热潮。
D.究竟要不要努力学习?是不是随便应付就可以了呢?我们的回答是否定的。
5.综合性学习。
(5分)材料一:每年四月是我国“全民读书月”。
一个爱阅读的民族,才能其正铸就过硬的软实力。
材料二:湖北省著名的百岁将军童陆生,他的健康经验有“三乐”,即心宽为乐,读书为乐,助人为乐。
他深知读书可以陶冶性情,延缓衰老。
至今,他除了读医学、文学杂志外,还整理出多个诗集和回忆录。
材料三:《语文课程标准》向中学生推荐了几十本经典必读书目,但遗憾的是,我们常常看到许多中学生的经典闵读只停留在根据古典名著改编的影视作品上。
湖北省武汉市江汉区2023-2024学年七年级上学期期末语文试题(含解析)

湖北省武汉市江汉区2023-2024学年七年级上学期期末语文试题学校:___________姓名:___________班级:___________考号:___________一、选择题1.下列加点的字词书写或读音有误的一项是()A.狭隘(ài)坍(tān)塌硬朗见异思迁B.干涸(hé)蜷(quán)伏怂恿神采奕奕C.恍惚(huǎng)怅(zhàng)然蓬勃大相胫庭D.嗔(chēn)怪蹒跚(pán)缥缈随声附和2.依次填入下面横线处的词语,恰当的一组是()(1)不少的人对同志对人民不是满腔,而是冷冷清清,漠不关心,麻木不仁。
(2)那只花白猫对于这一对黄鸟,似乎也特别注意,常常跳在桌上,对鸟笼着。
(3)从喧闹的城市搬到这里安家的人带来了青春和活力,还有新生活的勇气。
(4)在这片美丽富饶的土地上,人类就世世代代下来,并且一天比一天加多了。
A.热忱凝神摸索绵延B.热切凝望摸索延伸C.热切凝神探索延伸D.热忱凝望探索绵延3.下列各句标点符号使用不规范的一项是()A.12月18日,甘肃临夏州积石山县发生6.2级地震,造成重大人员伤亡。
各方救援力量闻令而动、紧急驰援,在危急关头体现出人民至上、生命至上的价值追求。
B.随着快递量爆炸式增长,人工分拣无法应对超大规模物流需求,大量包裹堆积在快递网点或分拣中心,爆仓,滞后等情况十分普遍,严重影响消费者的购物体验。
C.近日,我国自主设计建造的首艘大洋钻探船——“梦想”号在广州南沙首次下水试航,此举标志着我国深海探测能力建设和海洋技术装备研发迈出了重要的一步。
D.《聊斋志异》多写花妖鬼狐之事,或揭露封建统治的黑暗,或抨击科举制度的腐朽,或反抗封建礼教的束缚,或讽刺世间百态的荒唐,有着丰富深刻的思想价值。
4.下列加点实词理解有误的一项是()A.非宁静则无以致远致:达到 B.顾野有麦场顾:看C.一狼洞其中洞:打洞 D.身亡所寄亡:丢失5.下列加点虚词理解有误的一项是()A.宋之丁氏之:的B.以刀劈狼首以:用C.狼亦黠矣,而顷刻两毙而:于是D.非得一人于井中也于:在6.下列对文本内容的理解有误的一项是()A.诸葛亮在《诫子书》中指出,人要通过修身养德来达到“静”和“俭”的目的。
人教版七年级上学期数学《期末测试题》含答案解析

A. 1,﹣3,0B. 0,﹣3,1C. ﹣3,0,1D. ﹣3,1,0
[答案]A
[解析]
使得它们折成正方体后相对的面上两个数互为相反数,则A与-1,B与3;C与0互为相反数.
17.计算:
(1)﹣8﹣3×(﹣12)+8;
(2)﹣6× ﹣|(﹣8)÷2|
18.(1)化简:
(2)先化简,再求值: ,其中 , .
19.解方程
(1)
(2)
20.为了某校七年级学生对 《最强大脑》、 《朗读者》、 《中国诗词大会》、 《极限挑战》四个电视节目的喜爱情况,随机抽取了 位学生进行调查统计(要求每位学生选出并且只能选一个自己最喜爱的节目),并将调查结果绘制成如下两幅不完整的统计图(图1,图2)
7.若 的和是单项式,则 的值是()
A.1B.-1C.2D.0
[答案]A
[解析]
[分析]
和是单项式说明两式可以合并,从而可以判断两式为同类项,根据同类项 相同字母的指数相等可得出x、y的值.
[详解]解:由 的和是单项式,
则x+2=1,y=2,
解得x=−1,y=2,
则xy=(−1)2=1,
故选A.
[点睛]本题考查同类项的知识,属于基础题,注意同类项的相同字母的指数相同.
(2)当 _________秒时, ;
(3)若点 、 与线段 同时移动,点 以每秒2个单位长度的速度向数轴的正方向移动,点 以每秒1个单位长度的速度向数轴的负方向移动.在移动过程中,当 时, 的值为__________.
山东省淄博市沂源县2023-2024学年七年级(五四学制)上学期期末语文试题

七年级语文试题(时间:120分钟满分:150分)一、基础知识积累与运用(每小题3分,共18分)请阅读下列语段,回答1-3小题。
小时候我很喜欢画马,某日完成了一副..猎人骑马登山图,正得意时,母亲过来对我说:“马背上的人坐得太挺了,你要知道,当骑马上坡的时候,身子要向前倾,否则人跟马都容易翻倒..。
”过了不久,我又画了一幅骑马下山的画,母亲看了还是不满意①(:)“这次你画中人物的身子又过于向前倾了①(。
)骑马下坡时,马固然往山下走,人却要坐得挺①(;)如果骑手也跟着马向前倾,就容易滑下去”①(。
)我有些 A :“为什么有这么多规矩..呢?反正人骑马,爱怎么骑就怎么骑!”“要想骑得平稳快速,不颠簸..,不倾倒,不被掉下马背,不至于滚落山崖,一定要讲究方法。
”母亲说,“这就好比处世,当马向高处爬时,仿佛是你 B 的时刻,愈得意愈应 C ,所以人要向前倾;至于下山,则仿佛 D 时,固然是往坡下溜,你反而要坐得挺、撑得直。
”(摘自《画马·刘墉》)1.下列文中加点字注音或字形无误的一项是()A.一副B.翻倒(dào)C.规矩(jǔ)D.颠簸2.文中横线处须填词语使用有误的一项是()A.懊恼B.得意C.自矜D.失意3.文中①①①①处标点符号使用有误的一项是()A.①处B.①处C.①处D.①处4.下列句子表述有误的一项是()A.天文科普专家介绍,公历2024年为闰年,2月有29天,全年共有366天,而即将到来的农历甲辰年(龙年)则是平年,全年共有354天。
B.元旦假日期间,城乡居民出游意愿强烈,文化参与氛围浓厚,音乐节、演唱会,家人和亲友集体出游趋于增加。
旅游市场呈现“冰雪休闲、文化参与,本地出游、个性消费;人间烟火、欢乐祥和”。
C.如今,农业数字化技术员越来越多,这个称谓也出现在2022年6月人社部公布的新职业名单中。
年轻人正以新的方式,成为农业生产生力军,他们不仅能冒出不一样的创意,还能让农田里长出更多稻子。
浙江省七年级数学上学期期末试卷(含解析)浙教版

浙江省七年级数学上学期期末试卷(含解析)浙教版七年级上学期期末数学试卷一、仔细选一选(本大题有10小题,每小题3分,共30分。
请选出各题中一个符合题意的正确选项,不选、多选、错选,均不得分。
)1.-2016的倒数是()A。
-2016 B。
2016 C。
0答案:B2.9的平方根为()A。
3 B。
-3 C。
±3 D。
0答案:C3.如图,数轴上的点A、B、C、D、E分别对应的数是1、2、3、4、5,那么表示A。
线段AB上 B。
线段BC上 C。
线段CD上 D。
线段DE上答案:B4.下列选项是无理数的为()A。
-√8 B。
8 C。
3.xxxxxxx D。
-π答案:A、C、D5.2cm接近于()A。
珠穆朗玛峰的高度 B。
三层楼的高度 C。
XXX的身高D。
一张纸的厚度答案:D6.若x=2是关于x的方程2x+3m-1=0的解,则m的值为()A。
-1 B。
1 C。
0 D。
2答案:A7.XXX买书需用48元钱,付款时恰好用了1元和5元的纸币共12张。
设所用的1元纸币为x张,根据题意,下面所列方程正确的是()A。
x+5(12-x)=48 B。
x+5(x-12)=48 C。
x+12(x-5)=48 D。
5x+(12-x)=48答案:A8.如图,点A、B、C是直线l上的三个点,图中共有线段条数是()A。
1条 B。
2条 C。
3条 D。
4条答案:C9.在直线AB上任取一点O,过点O作射线OC、OD,使OC⊥OD,当∠AOC=30°时,∠BOD的度数是()A。
60° B。
120° C。
60°或90° D。
60°或120°答案:B10.计算:31+1=4,32+1=10,33+1=28,34+1=82,35+1=244,…,归纳各计算结果中的个位数字的规律,猜测+1的个位数字是()A。
0 B。
2 C。
4 D。
8答案:C二、认真填一填(本题有6小题,每小题4分,共24分。
数学浙江七年级上学期期末练习卷(附答案)
数学浙江七年级上学期期末练习卷一、单选题1.比-2大1的数()A.-3B.-1C.−12D.22.中国的太空空间站离地球大约400000米.则近似数400000用科学记数法表示为()A.4×104B.40×104C.4×105D.40×105 3.计算5÷(−2−3)的结果是()A.-1B.15C.−15D.−1254.在数17.−π.0.314.√2.−√64.5中.无理数的个数有()A.1个B.2个C.3个D.4个5.如图是同一时刻北京时间和莫斯科时间.若现在北京时间是x.则同一时刻莫斯科的时间可以表示为()A.x+6B.x−6C.x+5D.x−56.一个角的补角是它的余角的3倍.则这个角等于()A.30°B.45°C.60°D.90°7.我们可以用列方程的方法解决某些数学谜题.如图.小慧同学要猜出“口”中数字.列出可以求解的方程是()A.12(460+x)=21(100x+64)B.12(46+10x)=21(100x+64)C.12(46+10x)=21(10x+64)D.12(460+x)=21(10x+64)8.从杭州东站出发到金华南站的动车.中途要停靠诸暨站和义乌站.则铁路部门供旅客购买的火车票要准备()A.12种B.10种C.6种D.4种9.按图示的方法搭1个三角形需要3根火柴棒.搭2个三角形需要5根火柴棒.现有2022根火柴棒.能搭这样的三角形个数为()A.1010个B.1011个C.1012个D.1013个10.如图是一个3×3在正方形网格.将A、B、C三个棋子放在方格中.规定:每行和每列只能出现一个棋子.则一共的放法有()A.18B.27C.36D.48二、填空题11.−3的倒数是12.如图是小强与他妈妈的对话.小强说:买笔记本花了1.2元…….则小强记不清怎么使用的零花钱有元.13.如图3×3方格中.则正方形ABCD的边长是.(方格的边长为1)14.如图是一个时钟在8:00这个时刻的图形.时针与分针所成的角为度.15.如图所示.一块砖的外墙面积为x.那么图中残缺墙面的面积为 .16.一个长方形被分成四个部分的面积分别为S 1.S 2.S 3.S 4.(1)如图1.若被两条直线分成四个长方形.S 1=20.S 2=25.S 3=15.则S 4= ;(2)如图2.若被条线段分成四个三角形.在①S 1和S 2.②S 1和S 3.③S 1和S 4.④S 2和S 4中.已知 则可以求出长方形的面积(填序号).三、解答题17.计算:(1)−3+5−(−8)(2)√9−22×14+√−273×|−13|.18.解方程:(1)2(4−x)=2x . (2)1+x 0.1−0.4x−0.50.2=12.19.先化简.再求值:2a 2b −[2ab 2−2(a 2b +2ab 2)].其中a =−12,b =2.20.放置在水平地面上两个无盖(朝上的面)的长方体纸盒.大小、形状如图.小长方体的长、宽、高分别为:a (cm )、b (cm )、c (cm );大长方体的长、宽、高分别为:1.5a (cm )、2b (cm )、2c (cm ).(1)做这两个纸盒共需要材料多少平分厘米?(2)做一个大的纸盒比做一个小的纸盒多多少平分厘米材料21.如图1.已知∠BOC=40°.OE平分∠AOC.OF平分∠BOC.(1)若AO⊥BO.则∠EOF是多少度?(2)如图2.若角平分线OE的位置在射线OB和射线OF之间(包括重合).请说明∠AOC的度数应控制在什么范围.22.如图.线段AB的中点O是数轴原点.点C在点O右侧.分线段AB的长度为3:2.且OC=3.(1)求点A在数轴上代表的数是什么?请说明理由.(2)若点P从点C出发.以3个单位/秒的速度向点A运动.到点A停止;点Q从点O出发.以1个单位/秒速度向点B运动.到点B后停止.问运动时间t为几秒时.PA=QB?23.小明爸爸在一家电信公司了解到两种移动电话计费方法:计费方法A是每月收月租费30元.通话时间120分钟内免费.超过120分的部分按每分钟0.25元加收通话费;计费方法B是每月收月租费50元.通话时间200分钟内免费.超过200分的部分按每分钟0.2元收通话费.(1)若小明爸爸一个月的通话时间大约在150分钟和160分钟之间.请通过计算说明选用哪种计费方式.可以节省费用?(2)小明爸爸当前选择了计费方式A.有一个月累计通话240分钟.话费m元.若改成用计费方法B.则同样话费m元.可多通话多少分钟?(3)从节省话费的角度考虑.帮小明爸爸选择合适的计费方式.24.问题提出:如图1.A、B、C、D表示四个村庄. 村民们准备合打一口水井.(1)问题解决:若水井的位置现有P、Q两种选择方案.点P在线段BD上.点Q在线段AB上.哪一种方案的水井到各村庄的距离总和较小?请说明你判断的理由.(2)你能给出一种使水井到各村庄的距离之和最小的方案吗?若能.请图2中标出水井的位置点M.并说明理由.(3)问题拓展:如果(2)问中找出的水井经过招标.由两个工程队修建(不存在同时修建). 已知甲工程队单独完成需要80天.乙工程队单独完成需要120天.且甲工程队比乙工程队每天多修建0.5m.问水井要修建几米?(4)若甲工程队每天的施工费为0.5万元.乙工程队每天的费用是0.25万元.为了缩短工期和节约资金.则甲工程队最多施工几天才能使工程款不超过35万元?(甲、乙两队的施工时间不足一天按一天算).答案解析部分1.【答案】B 2.【答案】C 3.【答案】A 4.【答案】B 5.【答案】D 6.【答案】B 7.【答案】A 8.【答案】A 9.【答案】A 10.【答案】C 11.【答案】-1312.【答案】16.8 13.【答案】√5 14.【答案】120 15.【答案】72x16.【答案】(1)12(2)②或④17.【答案】(1)解:−3+5−(−8)=−3+5+8=10(2)解:√9−22×14+√−273×|−13|=3−1+(−3)×13=3−1−1=118.【答案】(1)解:2(4−x)=2x去括号得:8−2x =2x 移项得:−2x −2x =8 合并同类项得:−4x =8系数化为1得:x =2 (2)解:1+x 0.1−0.4x−0.50.2=12方程整理得:10(1+x)−4x−52=12 去分母得:20(1+x)−(4x −5)=1 去括号得:20+20x −4x +5=1 移项得:20x −4x =1−20−5 合并同类项得:16x =−24系数化为1得:x =−3219.【答案】解:2a 2b −[2ab 2−2(a 2b +2ab 2)]=2a 2b −(2ab 2−2a 2b −4ab 2) =2a 2b −2ab 2+2a 2b +4ab 2=4a 2b +2ab 2当a =−12,b =2时原式=4×(−12)2×2+2×(−12)×22=−220.【答案】(1)解:小长方体纸盒所需材料:ab +2ac +2bc大长方体纸盒所需材料:3ab +6ac +8bc所以一共所需材料:ab +2ac +2bc +3ab +6ac +8bc =4ab +8ac +10bc (2)解:(3ab +6ac +8bc)−(ab +2ac +2bc)=2ab +4ac +6bc21.【答案】(1)解:∵∠BOC =40°.AO ⊥BO∴∠AOB =90°,∠AOC =∠AOB +∠BOC =130° ∵OE 平分∠AOC .OF 平分∠BOC∴∠EOC =12∠AOC =65°,∠COF =12∠BOC =20°∴∠EOF =∠EOC −∠FOC =65°−20°=45°(2)解:如图1.当OE 与OF 重合时.∠AOC 最小.∠AOC =40°如图2.当OE与OF重合时.∠AOC最大.∠AOC=2∠BOC=80°所以.40°≤∠AOC≤80°.22.【答案】(1)解:点A在数轴上代表的数是−15.理由如下:设BC=2x.AC=3x.则OB=2x+3.AO=3x−3可列方程3x−3=2x+3解得x=6所以AO=15又因为点A在数轴的负半轴上所以点A在数轴上代表的数是-15(2)解:由(1)得:OB=AO=15.AC=18①点P停止前:PA=18−3t.QB=15−t.∵PA=QB∴18−3t=15−t∴t=1.5秒②点P停止后:PA=QB点P从点C出发.以3个单位/秒的速度向点A运动.到点A停止.需要6秒点Q从点O出发.以1个单位/秒速度向点B运动.到点B后停止.需要15秒∵PA=QB∴t=15秒综上所诉:t=1.5秒或15秒23.【答案】(1)解:选择A的话.计算方法A的费用在30+(150−120)×0.25=37.5元和30+ (160−120)×0.25=40元之间;∵150<200,160<200.计算方法B需要50元.故答案为:计算方法A可以节省费用(2)解:由题意得:m=30+(240−120)×0.25=60(元)若改成用计费方法B.设通过时间为t分钟.则60=50+(t−200)×0.2解得:t=250(分钟)∴250−240=10(分钟)所以可多通话10分钟;(3)解:当通话时间t<200分钟时.30+(t−120)×0.25<50.选择计费方法A;当通话时间t>200分钟时.30+(t−120)×0.25>50.选择计费方法B;当通话时间为t=200分钟时.30+(200−120)×0.25=50.两个方案可以任选一个.24.【答案】(1)解:选P.理由如下:如图:P到A、B、C、D的距离之和为:PD+PB+PC+PA=BD+PA+PCQ到A、B、C、D的距离之和为:QD+QB+QC+QA=AB+QD+QC经测量BD+PA+PC<AB+QD+QC所以点P到各村庄的距离总和较小.故答案为:P.(2)解:如图:连接AC.当打井的位置选在AC和BD的交点时.水井到各村庄的距离之和最小.根据“两点之间线段最短” .(3)解:设乙工程队每天修建x米.则甲工程队每天修建x+0.5米可列方程:80(x+0.5)=120x.解得x=1所以水井要修建120米(4)解:设甲工程队最多施工m天才能使工程款不超过35万元可列方程:0.5m+0.25×(120−1.5m)=35.解得m=40所以.甲工程队最多施工40天才能使工程款不超过35万元。
人教版七年级上学期数学《期末测试题》带答案
[解析]
[分析]
根据数轴的知识点解答即可;
[详解]有数周可知,点A表示的有理数为 ,点B表示的有理数是 ,
∴A、B两点之间的距离是 .
故答案为:+1、-2.5、3.5
[点睛]本题主要要查了数轴的知识点,准确分析是解题的关键.
14.若 与 互为相反数,则 的值为_________.
9.已知 三点在同一条直线上,如果线段 ,那么 两点的距离 的长度为()
A. B.
C.小于或等于 ,且大于或等于 D. 或
10.如图,∠AOC和∠DOB都 直角,如果∠AOB=150°,那么∠DOC=()
A.30°B.40°C.50°D.60°
二、填空题(每题3分,满分24分,将答案填在答题纸上)
11.如果 那么 的值是______________.
[答案]D
[解析]
数轴上的点平移和其对应的数的大小变化规律:左减右加.
解:根据题意,Leabharlann 0+3-7=-4.故选D.
考查了数轴上点的平移和数的大小变化规律.
5.计算 的结果是()
A. B. C.2D.-1
[答案]A
[解析]
[分析]
根据绝对值的性质求解即可.
[详解]解: ,
故选:A.
[点睛]本题考查绝对值的性质,掌握绝对值的性质是解题的关键.
25.世界读书日,某书店举办“书香”图书展,已知《汉语成语大词典》和《中华上下五千年》两本书的标价总和为150元,《汉语成语大词典》按标价的50%出售,《中华上下五千年》按标价的60%出售,小明花80元买了这两本书,求这两本书的标价各多少元.
答案与解析
一、选择题:本大题共10个小题,每小题3分,共30分.在每小题给出的四个选项中,只有一项是符合题目要求的.
人教版七年级上学期生物《期末测试题》及答案解析
33.小明同学学习了“练习使用显微镜”之后,用显微镜观察口腔上皮细胞的结构.根据有关知识回答下列问题:
(1)图1是显微镜的构造,写出结构的名称;①是____________,④是___________,⑨是______________
(2)小明在用显微镜观察玻片标本时,应先选用_____倍物镜观察.
人 教 版 生 物七年 级上学 期
期末测 试 卷
学校________班级________姓名________成绩________
一、单项选择题
1.下列属于生物的是()
A.珊瑚B.珊瑚虫C.机器人D.电脑
2.我国南方地区,森林覆盖率高,往往降雨较多,而且气候湿润,这种现象说明()
A. 生物能够影响环境B. 生物能适应环境C. 生物生存依赖环境D. 环境影响生物生存
C. 碘液、自来水、生理盐水D. 凉开水、生理盐水、碘液
[答案]D
[解析]
[分析]
制作口腔上皮临时装片的实验步骤,简记为:擦→滴→漱→刮→涂→盖→染.
[详解]制作口腔上皮细胞临时装片的正确顺序是:用纱布将载玻片和盖玻片擦拭干净,放在实验台上备用;滴一滴生理盐水在载玻片中央,目的是维持口腔上皮细胞的原有形状;用凉开水漱口,以去除口腔中的食物残渣;用消毒的牙签在口腔侧壁上轻轻刮几下,取得口腔上皮细胞,再在把牙签附有碎屑的一端在载玻片的生理盐水滴中均匀涂抹;盖上盖玻片,先用镊子夹起盖玻片的一边,让另一边先接触载玻片上的生理盐水滴;然后轻轻盖上,避免出现气泡;染是指染色,把稀碘液滴在盖玻片的一侧,用吸水纸从另一侧吸引,直到染液浸润到标本的全部.因此制作人口腔上皮细胞的临时装片时,用于漱口的液体、载玻片上滴加的液体、染色用的液体分别是凉开水、生理盐水、碘液.
人教版七年级上学期数学《期末考试卷》及答案
期末测 试 卷
学校________班级________姓名________成绩________
满分100分时间90分钟
一、选择题(本大题共10个小题,每小题3分,共30分,在每小题给出的四个备选答案中,只有一个是正确的,请你将正确答案涂在答题纸上指定位置,答到试卷上不得分.)
[答案]
[解析]
8.如图,把矩形 沿 对折后使两部分重合,若 则 ()
A. B. C. D.
[答案]B
[解析]
[分析]
根据翻折的性质可得∠2=∠3,再由平角的定义求出∠3.
[详解]解:如图
∵矩形 沿 对折后两部分重合, ,
∴∠3=∠2= =65°,.
故选:B.
[点睛]本题考查了矩形中翻折的性质,平角的定义,掌握翻折的性质是解题的关键.
[详解]解:由一元一次方程的特点得a−2=0,
解得:a=2;
故原方程可化为2x+1=0,
解得:x= .
故答案为: .
[点睛]本题主要考查了一元一次方程的一般形式,未知数的指数是1,一次项系数不是0,特别容易忽视的一点就是系数不是0的条件,高于一次的项系数是0.
18.已知如图,直线 、 相交于点 , 平分 ,若 ,则 的度数是______.
[详解]解:由题意可知A、B两点表示的数互为相反数,
设A表示的数为a,则B表示的数为-a,
则 .
解得 ,
所以 、 对应的数分别是3,-3或-3,3.
故答案为:3,-3或-3,3.
[点睛]本题考查数轴上两点之间的距离,绝对值方程.能通过A、B两点关于原点对称得出A、B两点表示的数互为相反数是解题关键.
1.下列四个数中,其相反数是正整数的是()
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七年级上学期期末练习题(一)最单项选择11. Mary is Australian, _____________ she lives in Germany.A. butB. orC. andD. so12. —_____________ do you write an English composition? —Sometimes.A. How longB. How oftenC. How muchD. How far13. —What‟s your favorite sport? —Mountain climbing.—Wow! It‟s exciting, but at the same time you _______________ not forget the danger. A. can B. may C. must D. might14. —Coffee is ready. How nice it ___________!Would you like some?—Yes, please. A. feels B. looks C. sounds D. smells15. How about ____________ to the radio or reading a newspaper in English ?A. listenB. listeningC. to listenD. listened16. There are some people in the park, ______________?A. are thereB. aren‟t thereC. is thereD. isn‟t there17. —When are you ___________ for your new house?—Several weeks later, for we don‟t have to move in a hurry.A. comingB. goingC. leavingD. arriving18. Our English teacher ___________ to England. She‟ll come baek in ten months. A. has gone B. has been C. have been D. have gone19. —Which subject do you like __________, Chinese or math? —Of course math. And I think it‟s the ______________ interesting of all subjects. A. best; most B. better; most C. better; more D. best; more20. We wont go to the Great Wall if it ____________ tomorrow.A. rainB. is rainingC. will rainD. rains21. —I called you at seven yesterday evening, but there was no answer. —Oh, I am sorry, I _____________ dinner at that time in my friend‟s home. A. have B. had C. was having D. have had22. —Could you give me a hand, please? —Sure. What would you like me ________________? A. do B. to do C. doing D. does23. The teacher ____________ a gift, but he didn‟t _________ it.A. accepted ; acceptB. accepted ; receiveC. received ; receiveD. received; accept24. My father _____________ to America on business two days ago. A. flies B. flew C. will fly D. was flying25. —__________ when you first met him? —It was October 26th, 2006.A. What day was itB. What time was itC. What was the dateD. What was the weather like三、完型填空(共10分,每小题1分)Everyone in our school loves sports. Every morning 26 we get up, we do morning exercises. After the second class we do exercises again. We only have 27 classes twice a week, but we do physical training(锻炼)at five every afternoon. The most popular sport is basketball. The 28 enjoy playing it andmany of the girls like it, too. 29 popular sport is football and in every class there 30 a lot of football fans. 31 volleyball is played when the weather is fine. We have school teams in basketball, football and volleyball. Our teams often 32 friendship(友谊)matches with the teams from other schools. When there is a match, 33 of us go to watch it and cheer our side on. Beside(除……之外)ball games, some of us like track-and-field events(田径项目), 34 we often practice running, jumping and throwing. Every term we have tests in these events and once a year we hold a sports meeting. Sports help us to keep 35 .26. A. while B. when C. before D. after27. A. English B. Chinese C. P.E. D. music28. A. teacher B. boys C. students D. people29. A. Some other B. Other C. Another D. The other30. A. are B. is C. were D. was31. A. Never B. Often C. Usually D. Always32. A. see B. have C. look at D. watch33. A. several B. few C. a little D. many34. A. because B. but C. or D. and35. A. thirsty and hungry B. healthy and happyC. fat and tiredD. thin and weak阅读部分(A)INVITATION(邀请)TO A GOING - AWAY PARTY Sunday, January 13 Dear Li Yang and Lu Ming, You are invited to a party for our foreign teacher Miss Green‟s return to E ngland for her holiday. She leaves on January 20. The best part of the party will be when we sing and dance together. Party given by: Students‟ Union Date: Saturday, January 19, 2013 Time: 6:00 p.m. to 9:30 p.m. Place: The Students‟ Dining Hall Reply by: F riday, January 18 Food and drinks will be provided(提供)at the party. Zhang Yu PS: This event is NOT to be missed! We hope to see you there!36. Why is Miss Green leaving?A. Because she will return to England for singing and dancingB. Because she will return to England for the party.C. Because she will return to England for her holiday.D. No one knows.37. When will they have the party?A. On Sunday, January 13th.B. On Friday, January 18th.C. On Saturday, January 19th.D. On Tuesday, January 20th.38. How long will the party last?A. For three hours.B. For two hours and a half.C. For four hours and a half.D. For three hours and a half.39. Where are they going to have the party?A. In their classroom.B. In the students‟ dining hall.C. At Zhang Yu‟s homeD. At Miss Green‟s home. 40. Who are Li Yang and Lu Ming? A. Zhang Yu‟s schoolmates. B. Zhang Yu‟s students C. Zhang Yu‟s teachers. D. Zhang Yu‟ssisters.(B)On a Friday night, a poor young violinist was playing his violin at the entrance (入口)of the subway station. The music was so great that people put some money into his hat. The next day, the violinist came to the entrance again. He put down his hat as usual. Beside the hat was a piece of paper with some words on it: “A George Sang has put an import ant thing into my hat by mistake. Welcome to claim(认领)it.” After a while a man named George Sang ran here quickly and got back his important thing. The important thing was a lottery ticket(彩票). Sang bought it and won a prize of $ 500, 000. But when he gave $ 50 to the violinist for his wonderful music, he threw the lottery ticket, too. The violinist was a college student. That morning, he was going to Vienna for his education. However, when he found the ticket, he cancelled the flight and returned to the en trance. He said, “Although I don‟t have much money, I live happily. If I lose honesty(诚实), I won‟t be happy forever.”41. The young man played the violin for _____________ at the entrance the next day.A. honestyB. moneyC. food42. George Sang put __________ into the violinist‟s hat on a Friday night.A. moneyB. a 1 ottery ticketC. money and his lottery ticket43. George Sang must be very ____ to see the young violinist the next day.A. happyB. sorryC. worried44. The underlined word “cancelled” means“_______________”.A. 取消B. 延误C. 预定45. What‟s the best title for this passage?A. The Meaning of Music.B. An Office Worker and a Lottery Ticket.C. The Importance of Being Honest.(C)What do you do to get pocket money from your parents? In Western countries, many children do housework to get pocket money. They usually start to do this at 10 years old. School students have to do homework and study for tests. They don‟t have a lot of free time in the week. They often do housework at the weekend. Young k ids only do easy housework. So they don‟t get much money. But that‟s all right. Many of them only want to buy candy. And candy is cheap! They help wash up after dinner and feed the family cat or dog. When they get older, kids want to buy more and more things. They want things that are more expensive than candy. Then they have to work harder! They often wash the family car, cut the grass, walk the dog or cook dinner. It is really a good way for kids to learn to do some new things. Of course, their parents will help them learn something at first. For example, parents often teach them how to cook before they can.46. What does “pocket money” means in this passage?A. 口袋里的钱B. 零花钱C. 钱包D. 储蓄罐47. Children in Western countries usually help do the house work at the age of___________. A. six B. nine C. ten D. fifteen48. Before young kids go to middle school, what do they usually want to buy with their pocket money?A. Cats.B. Dogs.C. Cars.D. Candy.49. When do the kids often do the housework?A. On Saturdays and Sundays.B. On weekday.C. In class.D. After dinner.50. Which of the following sentences is NOT true?A. They can get much money if they wash the dishes after dinner.B. Their father or mother will help them learn to cook at first.C. They will get more money to walk a dog than to feed it.D. The kids are busy on weekdays.二、阅读短文还原句子A. He always reads English at his desk.B. He always prepares his lessons very carefully.C. He is a teacher of English at No. Five Middle School.D. All his students like his classes.E. He always says that by writing he can learn a lot of things.My father is forty years old. 6. ________ I think he is a very good father. My father is a hard-working man. He has a lot of books, magazines and newspapers in his bed room. Most of them are about English because he likes English very much. 7. _____________ Sometimes he uses his computer to practice speaking English. He often writes something for English paper. 8. __________ My father enjoys writing very much. Every day he studies late into the night. My father is a good English teacher. 9. ___________ He goes to work very early and leaves school very late. Every day many students ask him questions. Sometimes he even forgets to have his meals. His classes are very lively and inter esting. 10. ___________ I‟m proud of having such a father. I like my father. I want to be a teacher like him when I grow up.四、阅读与表达Hong Kong has about forty public beaches. Some of the beaches are among the best in the world. People can go there for a swim. You can go to most of them by bus. To go to some beaches you must take a boat. There are toilets, changing rooms and places to buy food and drink on most of the beaches. You will swim there without danger if you remember these instructions: 1. Never swim alone. 2. Never swim after a meal or when you feel hungry or tired. 3. Do not stay in the water too long. 4. Never go out in a boat if you cannot swim. Remember: A red flag means that it is dangerous for anybody to go into the water. A blue flag means that it is dangerous for children 根据短文内容,回答下列问题16. How many beaches are there in Hong Kong?17. Can we reach all the public beaches by bus?18. Will you swim after a meal?19. What can‟t you do if you can‟t swim?20. What does it mean when you see a blue flag?五、完成句子21. 为什么不走着去公园呢?__________________ on foot?22. 我学习英语已经两年了。