2020年5月6日辽宁省葫芦岛市普通高中2020届高三毕业班下学期第一次高考模拟考试数学(理)试题及答案
辽宁省葫芦岛市2020届高三下学期第一次模拟考试物理试题
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辽宁省葫芦岛市2020届高三下学期第一次模拟考试二、选择题:本题共8小题,每小题6分。
其中18、19、20、21题有多个选项符合题目要求,全部选对的得6分,选对但不全的得3分,有选错的得0分;其余小题只有一个选项符合题目要求。
14.质量为m的物体用轻绳AB悬挂于天花板上。
用另一轻绳OC系在AB绳上O点,轻绳OC保持水平向右拉O点使OA与竖直方向有一定角度,物体处于平衡状态。
现保持O点不变,使轻绳OC逆时针缓慢转至与OA绳垂直,如图所示。
用T和F分别表示绳OA段和OC段拉力的大小,在缓慢转动过程中:A.F逐渐变大,T逐渐变大B.F逐渐变小,T逐渐变小C.F逐渐变小,T逐渐变大D.F逐渐变大,T逐渐变小15.甲、乙两辆汽车在平直的公路上一前一后同向两条道上匀加速行驶。
计时起点乙车速度为0,甲车速度为10m/s,t=2s时两车并排行驶且速度均为20m/s,两车速度-时间图像如图所示,下列判断正确的是:A.t=1s时,甲车一定在乙车前边B.t=3s时两车还可能并排C.计时开始时乙车在甲车前方10m处D.0~2.5s内乙车的平均速度大于甲车的平均速度16.如图所示,一交流发电机的线圈通过滑环与理想变压器相连,理想变压器原线圈接有理想电压表和电流表,副线圈接有定值电阻和灯泡,它们的阻值相等(设灯泡阻值不变),且均为R,当线圈由图示位置(磁场恰好与线圈平面垂直)以转速n匀速转运时,灯泡恰能正常发光,电流表示数为I,理想变压器原、副线圈的匝数比为k.下列选项中正确的是:A.线圈在图示位置磁通量的变化率最大B.电压表示数为k2IRC.灯泡的额定功率为k2I2RD.从图示位置开始计时,变压器输入电压的瞬时值表达式u=2k2IRsin2nπt17.大量氢原子从n=4能级跃迁到n=2能级,辐射出的光照射下列三种金属,电子电量e =1.60×10-19C,普朗克常量h=6.30×10-34J·s。
2020葫芦岛一模 辽宁省葫芦岛市2020届高三下学期第一次模拟考试 生物含答案 Word版
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2020年葫芦岛市普通高中高三第一次模拟考试理科综合能力测试生物部分注意事项:1.本试卷满分300分;考试时间150分钟。
2.本试卷分第I卷、第II卷两部分,共14页。
其中第II卷第33~38题为选考题,其他题为必考题。
做选考题时,考生按照题目要求作答。
3.答题前,考生务必将自己的姓名、考号用2B铅笔涂写在答题卡上,用钢笔写在答题纸上。
4.用2B铅笔把第I卷的答案涂在答题卡上,用钢笔或圆珠笔把第II卷的答案写在答题纸上。
5.考试结束,将答题卡和答题纸一并交回。
第I卷一、选择题:本题共13小题,每小题6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。
1.下列关于载体蛋白和A TP共性的叙述,正确的是A.都属于生物大分子B.都含有N、S元素C.都存在于所有生物体D.都能用于细胞吸收K+2.下列有关细胞结构和功能的叙述,正确的是A.没有线粒体的细胞都不能进行有氧呼吸B.如果生物膜没有流动性,细胞就不能进行胞吞和胞吐C.如果没有细胞板的出现,所有生物细胞都无法正常分裂D.即使真核细胞没有核孔,细胞核与细胞质之间的物质交换与信息交流也能正常进行3.下表为某病人血液化验的结果,下列相关分析正确的是A.该病人发生病变的部位可能是垂体或下丘脑B.促甲状腺激素作用的靶器官是下丘脑和甲状腺C.促甲状腺激素和甲状腺激素在功能上具有协同关系D.促甲状腺激素和甲状腺激素的化学本质均为蛋白质4.线粒体中的[H]与氧气结合的过程需要细胞色素c的参与。
细胞接受凋亡信号后,线粒体中的细胞色素c可转移到细胞质基质中,并与Apaf-1蛋白结合引起细胞凋亡。
下列说法错误..的是A.细胞色素c与有氧呼吸第三阶段的反应有关B.细胞色素c功能丧失的细胞将无法合成A TPC.有氧呼吸过程中产生[H]的场所为细胞质基质和线粒体基质D.若细胞中Apaf-1蛋白功能丧失,细胞色素c将不会引起该细胞凋亡5.大约在10000年前,人类开始对生长繁殖速度慢、出肉率低、性情暴烈的野猪进行人工驯化,并逐步将其培育为家猪。
辽宁省葫芦岛市2020届高三下学期第一次模拟考试理科综合试题化学答案
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葫芦岛市普通高中2020年第一次模拟考试化学参考答案及评分标准一、选择题(每小题6分,共42分)7.D 8.C 9.B 10.C 11.A 12.B 13.D二、非选择题(共58分)26.(15分)(1) CO(g)+2H 2(g) CH 3OH(g) △H =-90.1kJ/mol (2分)(2) 曲线b (1分);H 2的含量越低,CO 的转化率越低(2分)(3)bc (2分) ;(4) 0.25(2分) ;1﹤c ﹤2(2分)(5) ①CO-2e -+O 2-==CO 2(2分);②2CH 3OH+CO-2e -==(CH 3O)2CO+2H +(2分) 27.(12分)(1) 2Al +2OH -+2H 2O=2AlO 2-+3H 2↑ (2分)(2) 溶解LiFePO 4,将Fe 2+氧化为Fe 3+(2Fe 2++H 2O 2+2H +=2Fe 3++2H 2O )(2分)(3) ① 2.5 (2分)② H 2PO 4-HPO 42-+H +,HPO 42-PO 43-+H +,加入Na 2CO 3后,CO 32-结合H +使c(H +)减小,促进上述电离平衡正向移动,c(PO 43−)增大,与Fe 3+结合形成磷酸铁沉淀(或者:H 2PO 4-HPO 42-+H +,HPO 42-PO 43-+H +,溶液pH 增大,c(H +)减小,促进上述电离平衡正向移动,c(PO 43-)增大,与Fe 3+结合形成磷酸铁沉淀 (2分)③ pH >2.5时,沉淀中的磷酸铁会有部分开始转变生成Fe(OH)3,使得部分PO 43-释放,导致磷沉淀率下降 (2分)(4) (NH 4)2Fe(SO 4)2+H 3PO 4+LiOH=2NH 4HSO 4+LiFePO 4↓+H 2O 或(NH 4)2Fe(SO 4)2+H 3PO 4+3LiOH=(NH 4)2SO 4+Li 2SO 4+LiFePO 4↓+3H 2O(2分)28.(16分)(1)① 直形冷凝管(或冷凝管) (2分) 除去Cl 2中混有的HCl 杂质(2分) ② F C B(2分)③ 将装置内的氯气排入D 内吸收以免污染空气,并将B 中残留的S 2Cl 2排入E 中收集(2分) ④ 滴入浓盐酸的速率(或B 中通入氯气的量,其他合理答案均得分) (2分)(2) S 2Cl 2遇水会分解放热,放出腐蚀性烟气(2分)(3) ①ac(多选,漏选不给分) (2分) ②22.4m 233V ×100%或2240m 233V %或9.6m V %或9.61m V %(2分) 35.(15分)(1)1s 22s 22p 63s 23p 63d 10(或[Ar] 3d 10)(2分) ; 4(1分)(2)N >O >C (2分) ;3:1(2分) 8分 7分 8分 7分 6分 6分8分 8分(3)sp2(1分);HCHO与水分子间存在氢键(2分)(4)配位键(1分);C(1分)(5)①正四面体(1分);②(2分) 36.(15分)(1)取代反应(1分)(2)浓硝酸、浓硫酸(2分)(3)氯原子、硝基(2分)(4)①(2分)②(2分)(5)10(2分);或(2分)(6)(2分)7分8分。
辽宁省葫芦岛市2020届高三下学期第一次模拟考试理科综合试题
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………………………………………………装…………订…………线………………………………………………葫芦岛市2020年普通高中高三第一次模拟考试理科综合能力测试注意事项:1. 本试卷满分300分;考试时间150分钟。
2. 本试卷分第Ⅰ卷、第Ⅱ卷两部分,共14页。
其中第Ⅱ卷第33~38题为选考题,其他题为必考题。
做选考题时,考生按照题目要求作答。
3. 答题前,考生务必将自己的姓名、考号用2B铅笔涂写在答题卡上,用钢笔写在答题纸上。
4. 用2B铅笔把第Ⅰ卷的答案涂在答题卡上,用钢笔或圆珠笔把第Ⅱ卷的答案写在答题纸上。
5. 考试结束,将答题卡和答题纸一并交回。
可能用到的相对原子质量:H:1 C:12 N:14 O:16 Na:23 Mg:24 Al:27S:32 Cl:35.5 Fe:56 Cu:64 Zn:65 Ba:137第Ⅰ卷一、选择题:本题共13小题,每小题6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。
1.下列关于载体蛋白和A TP共性的叙述,正确的是A.都属于生物大分子B.都含有N、S元素C.都存在于所有生物体D.都能用于细胞吸收K+2.下列有关细胞结构和功能的叙述,正确的是A.没有线粒体的细胞都不能进行有氧呼吸B.如果生物膜没有流动性,细胞就不能进行胞吞和胞吐C.如果没有细胞板的出现,所有生物细胞都无法正常分裂D.即使真核细胞没有核孔,细胞核与细胞质之间的物质交换与信息交流也能正常进行3.下表为某病人血液化验的结果,下列相关分析正确的是项目测定值参考范围单位促甲状腺激素 6.0 0.27~4.20 μIU/ml甲状腺激素24.0 3.10~6.80 pmol·L-1AB.促甲状腺激素作用的靶器官是下丘脑和甲状腺C.促甲状腺激素和甲状腺激素在功能上具有协同关系D.促甲状腺激素和甲状腺激素的化学本质均为蛋白质4.线粒体中的[H]与氧气结合的过程需要细胞色素c的参与。
细胞接受凋亡信号后,线粒体中的细胞色素c可转移到细胞质基质中,并与Apaf-1蛋白结合引起细胞凋亡。
辽宁省葫芦岛市2020届高三下学期第一次模拟考试文科综合试题 含答案
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2020年葫芦岛市普通高中高三年级第一次模拟考试历史参考答案及评分标准24.B 25.B 26.B 27.A 28.D 29.C30.A 31.B 32.B 33.C 34.A 35.A【必做题】41.(25分)(1)特点:①形式、体裁多样,内容丰富;(2分)②起源早,阶段性明显;(2分)③逐步发展为独立的专著;(2分)④日益社会化并具有一定约束性。
(2分)背景:①农耕经济的发展;(2分)②商品经济的发展和社会观念的变化;(2分)③儒家思想(理学)的影响;(2分)④宗法观念和传统家族制度的发展。
(2分)(2)新变化:①家训以家书为主要形式;(2分)②家训思想多元化,新旧并存。
(2分)认识:①要传承和发扬传统家训中的优秀思想和道德精髓;(2分)②以社会主义核心价值观为引领,实现传统家训的创造性转化,将优秀传统文化和现代社会主义先进文化相结合。
(3分)42.(12分)示例论题:美国通过立法等手段,有效地解决了民众住房问题。
(1分)论述:(1)背景:美国爆发严重经济危机,自由放任政策失灵,破产失业问题严重。
(2分)(2)措施:国家高度重视;立法保障;采取多种渠道和途径;主要面向普通民众。
使得美国的住房政策取得了一定的成效。
(4分)(3)原因:美国经济基础雄厚;将解决住房问题与建立社会保障制度相结合;采用市场经济体制,运用信贷等手段,将短期救济与长期计划相结合,具有可持续性。
(4分)综上所述,美国解决住房的政策和举措,值得我们借鉴。
(1分)【选做题】45.(15分)【历史上重大改革回眸】(1)背景:①“三冗”“两积”引起的严重的社会危机(内忧外患);(2分)②革新除弊成为朝野共识。
(2分)内容:整顿吏治、培养人才、发展生产、加强武备、厉行法治等。
(注:以上每点1分,只要答出3点,即可得3分。
)(2)评价:①这次改革是对北宋初期建立的专制主义中央集权体制进行的一次调节、完善和加强,是为了延长北宋封建王朝的统治寿命。
2020届辽宁省葫芦岛市普通高中高三第一次模拟考试英语试题 解析版
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辽宁省葫芦岛市普通高中2020届高三第一次模拟考试英语试题注意事项:1.本试卷分Ⅰ卷、Ⅱ卷两部分,满分:150分;考试时间:120分钟。
2.答题前,考生务必将自己的姓名、考号填写在答题卡上。
3.选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其它答案标号。
不能答在本试卷上,否则无效。
第Ⅰ卷第一部分听力(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。
每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
1. When are the two speakers going to the school?A. On Saturday’s morning.B. On Sunday’s afternoon.C. On Saturday’s afternoon.2. Where does the man come from?A. America.B. England.C. Japan.3. What does the woman suggest the man do?A. Not smoke so heavily.B. Give up smoking.C. Take more exercise.4. What is the woman looking for?A. A friend’s house.B. A restaurant.C. A single room for night.5. When does the Boeing 747 leave for New York?A. At 805.B. At 845.C. At 855.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。
每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
辽宁省葫芦岛市2020届高三理综下学期第一次模拟考试试题(扫描版)
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2019 年葫芦岛市一般高中第一次模拟考试生物学科参照答案及评分标准29.( 10 分。
每空 2 分)(1) 无水乙醇溶解度(2) 类囊体薄膜到叶绿体基质(3) 细胞质基质和线粒体酶 ( 的催化作用 )说明:( 1)( 2)为一个得分点( 6 分),( 3)为一个得分点( 4 分)30.( 9 分。
除说明外每空 1 分)(1)蛋白质 ( 蛋白质和蛋白质 )特异(或专一)(2)突触小体胞吐(3) 经过多巴胺转运体被突触前神经元从头摄取 (2 分) 可卡因会阻挡 ( 克制 ) 突触前神经元回收多巴胺,致使突触空隙的多巴胺增加,进而使大脑有关神经中枢连续喜悦( 每点 1分,共 3分) 说明:( 1)( 2)为一个得分点( 4 分),( 3)为一个得分点( 5 分)31. ( 8 分。
除说明外每空 2 分)(1) 自我调理能力(2) 次生速度和方向(3) ( 种群之间的直接 ) 竞争 (1 分 )(4) 构造和功能 (1 分 )说明:( 1)( 2)为一个得分点(6 分),( 3)( 4)为一个得分点( 2 分)32. ( 12 分。
每空 3 分)(1) 常(2) BBX a Y和 bbX A X A ( 或X a YBB和 X A X A bb)9 /16(3)雌性果蝇全为橘黄色或淡黄色,雄性果蝇全为橘黄色说明:( 1)( 2)为一个得分点(9 分),( 3)为一个得分点(3 分)37. ( 15 分。
除说明外每空 2 分)(1)细菌 (1 分)(2) C 1酶、 C x酶葡萄糖苷酶(3) 梯度稀释刚果红染色①(4) 液体发酵固体发酵说明:( 1)( 2)为一个得分点(5 分),( 3)( 4)为一个得分点(10 分)38. ( 15 分。
除说明外每空 2 分)(1) 标志基因显微注射法受精卵(2) 敏捷度高 (1 分 ) 只分泌一种产生特异性抗体无穷增殖(3) 促性腺激素减数第二次分裂中期说明:( 1)为一个得分点( 6 分),(2)( 3)为一个得分点( 9 分)201914B 15B 16D 17C 18C19 AB 20ABD 21ACD22.26 (1)239132 F 2b23224. 14 1Bv ,2mgmv3Rv6m / s22XE P1 Kx 21 KfF N1F N mgE P1 f (x L ) 0 22XEP1K (2x) 21E P 2f (2xL ) mg 2R1mv 222225 18 1 a1a b11v av 0v b2v 0133a b v av 0 v b 2v 01332 a b 1at2v 0a P x y3g111x2v 0 2 v 0 219gy9gP2v 0 2v 0 2 19g9g3bCB1v b 2q b v b B 12m 1r1B 116mv13qLbDB, ,2R5L 12q b v b B 22m v b 2 1RB 216mv115qLbCD BB 16 mv0 B 16mv013qL 15qL33 1 ADE1224351 32 p1p2p1V1 p2V2 1V Vp1 2 p2 10 2p1 S p0 S G1p2 25 p0 6.25 p014n,pp2 S pS G1 V V 9Vp0 2 n p0 10 p210p 6 p0 1n49134(1)5BCE122435 1 30(2)10SO1111由几何关系. 1 分. 1 分②光在玻璃中流传距离为d, 流传速度为1 分光在玻璃中流传时间 1 分由几何关系 1 分解得: 1 分2019 年葫芦岛市一般高中第一次模拟考试化学参照答案及评分标准一、选择题(每题 6 分,共 42 分)7.C8.B9.A10.C11.D12 .B13.D二、非选择题(共58 分)26.(14分)( 1)① 4NH3(g)+6NO(g) 5 N 2(g)+6H 2O(g) △H =- 1805 kJ·mol-1(2分)②温度或压强;由于该反响是放热及体积增大的可逆反响,高升温度或增大压强,均衡均逆向挪动,使NH 的体积分数增大。
辽宁省葫芦岛市2020届高三第一次模拟考试理综-生物试题
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………………………………………………装…………订…………线………………………………………………2020年葫芦岛市普通高中高三第一次模拟考试理科综合能力测试-生物部分注意事项:1. 本试卷满分300分;考试时间150分钟。
2. 本试卷分第Ⅰ卷、第Ⅱ卷两部分,共14页。
其中第Ⅱ卷第33~38题为选考题,其他题为必考题。
做选考题时,考生按照题目要求作答。
3. 答题前,考生务必将自己的姓名、考号用2B铅笔涂写在答题卡上,用钢笔写在答题纸上。
4. 用2B铅笔把第Ⅰ卷的答案涂在答题卡上,用钢笔或圆珠笔把第Ⅱ卷的答案写在答题纸上。
5. 考试结束,将答题卡和答题纸一并交回。
可能用到的相对原子质量:H:1 C:12 N:14 O:16 Na:23 Mg:24 Al:27 S:32 Cl:35.5 Fe:56 Cu:64 Zn:65 Ba:137第Ⅰ卷一、选择题:本题共13小题,每小题6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。
1.下列关于载体蛋白和A TP共性的叙述,正确的是A.都属于生物大分子B.都含有N、S元素C.都存在于所有生物体D.都能用于细胞吸收K+2.下列有关细胞结构和功能的叙述,正确的是A.没有线粒体的细胞都不能进行有氧呼吸B.如果生物膜没有流动性,细胞就不能进行胞吞和胞吐C.如果没有细胞板的出现,所有生物细胞都无法正常分裂D.即使真核细胞没有核孔,细胞核与细胞质之间的物质交换与信息交流也能正常进行3.下表为某病人血液化验的结果,下列相关分析正确的是第15页(共16页)第15页(共16页)项目测定值 参考范围 单位 促甲状腺激素6.0 0.27~4.20 μIU/ml 甲状腺激素 24.0 3.10~6.80 pmol·L -1 A B .促甲状腺激素作用的靶器官是下丘脑和甲状腺C .促甲状腺激素和甲状腺激素在功能上具有协同关系D .促甲状腺激素和甲状腺激素的化学本质均为蛋白质4.线粒体中的[H]与氧气结合的过程需要细胞色素c 的参与。
2020届辽宁省葫芦岛市普通高中高三第一次模拟考试英语试题及答案解析
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2020届辽宁省葫芦岛市普通高中高三第一次模拟考试英语试题注意事项:1.答题前填写好自己的姓名、班级、考号等信息;2.请将答案正确填写在答题卡上。
第I卷(选择题)一、阅读理解When we’re in need, we always turn to our parents for help. But would you like them to hear the conversations you have with your friends on the school playground or lunch queue? Social networking sites have become extensions (延伸) of the school hallways, so would you add your parents as “friends” and allow them to view your online activities and conversations with friends?In the past the generation gap included a technology gap, where children were up to date with latest technology and parents were left behind, content to continue their day to day lives as they always had because they had no need to know more about technology. However, more and more parents are beginning to realize just how important social networks are in their lives. This realization has given many parents the motivation to educate themselves about social networking sites.These days many people are attracted to social networking sites because they can choose who they have around them; there’s also a certain amount of control over privacy that we don’t get in real life. Sometimes we feel that privacy is violated (侵犯)when we must accept a “friend” request from a parent or family member.It’s a difficult choice whether or not to allow a parent to become a part of our online lives. On the one h and we don’t want to “reject” their request because that might hurt their feelings or make them feel you have something to hide. On the other hand if you do accept, then you could have a sense of being watched and no longer feel free to comment or communicate the way you did before.A recent survey suggested that parents shouldn’t take it personally if their child ignorestheir request: “When a teen ignores a parent’s friend request, it doesn’t necessarily mean that they are hiding something, but it could mean that this is one part of their life where they want to be independent.”Perhaps talking with parents and giving explanations would help soften the blow if you do choose not to add them to your friends list.1.The passage is mainly about ______.A.privacy online B.parents’ friend requestsC.the generation gap D.social networks2.From Paragraph 2, we learn that ______.A.parents have realized the importance of social networksB.parents feel secure about their privacy onlineC.social networks successfully fill the generation gapD.social networks offer a platform for parents to communicate3.Teenagers may refuse a parent’s friend request because ______.A.their parents make negative comments on themB.they hide something from their parentsC.they are unwilling to be watched by parentsD.their parents tend to fall behind in technology4.The passage is written mainly for ______.A.parents B.teachersC.researchers D.teenagersDear Mr.ing,I’m Bob Watson, one of the customers in your grocery store. I’m writing to express my idea about your goods.Your Supermart is outstanding in many ways. First I enjoy the selection of produce and fresh bakery items. Second your low prices and excellent customer service keep me coming back to Supermart. I have found, however, that I must make a separate shopping trip to one of your competitors because there are many items your store does not carry. This becomes inconvenient for me, as my time is valuable, and I don’t like to make two trips. I have been a long time Supermart shopper and hope to continue for many years. If I could find all the items I need in one place, I would be a more satisfied customer.Specifically, I have never been able to purchase nacho cheese soup at your store. I can find other flavors (味道) of soup, but your store does not carry nacho cheese soup, a common ingredient (原料) in many of my recipes. In addition, I can only find large wonton wrappers, while many other stores carry both large and small and offer a more varied selection for their customers. Another example is Regent Brand Chili Seasoning. Though it is not a leading brand, it is still common on the shelves of other grocery stores in this area and is superior in flavor to its competitors.I sincerely hope to continue a relationship with your store, and I hope that you will consider the possibility of expanding your goods to be more competitive.Yours truly,Bob Watson 5.From the letter, we can learn that the author is ________.A.a very picky reporterB.a regular customer of the storeC.a responsible nutritionistD.a competitor of the store6.How does the author present his point in Paragraph 2?A.By comparing two different stores.B.By analyzing the figures.C.By providing scientific findings.D.By giving examples.7.According to Bob, the grocery store ________.A.offers good customer serviceB.is outstanding in every wayC.meets all his needsD.lacks convenient transportationIn India, most of the women wear a red dot between their eyebrows. While it is generally taken as an indicator of their marital(婚姻的)status, the practice is primarily related to the Hindu(印度教的)religion. The dot goes by different names in different Hindi dialects, and “bindi” is the one that is most commonly known.Traditionally, the dot carries no gender restriction Men as well as women wear it. However, the tradition of men wearing it has faded inrecent times, so nowadays we see a lot more women than men wearing one.The position of the bindi is standard center of the forehead, close to the eyebrows. It represents a third, or inner eye. Hindu tradition holds that all people have three eyes The two outer ones are used for seeing the outside world, and the third one is there to focus inward toward God. As such, the dot means piety(虔诚)and serves as a constant reminder to keep God in the front of a believer’s thou ghts.Red is the traditional color of the dot. It is said that in ancient times a man would place a drop of blood between his wife’s eyes to seal their marriage. According to Hindu beliefs, the color red is believed to bring good fortune to the married couple. Today, people go with different colors depending upon their preferences. Women often wear dots that match the color of their clothes. Decorative of sticker bindis come in all sizes, colors and variations, and can be worn by young and old, married and unmarried people alike. Wearing a bindi has become more of a fashion statement than a religious custom.8.Why did people in India start wearing a red dot on their forehead?A.To stress their family background.B.To indicate their social rank.C.To show their religious belief.D.To display their financial status.9.What is the function of the third eye in Hindu tradition?A.To help the other eyes see better.B.To look to the distance.C.To see the outside world.D.To pay respect to God.10.Why was red chosen as the original color of the bindi?A.The word “bindi”means “red” in some Hindi dialects.B.Red was believed to be a lucky color for husband and wife.C.The red dot represented the blood of God.D.Red stood for a wife’s love for her husband.11.Which of the following statements is true about bindis today?A.Bindis are now used to make people look better.B.Bindis are worn anywhere on the face now.C.Most Indian women do not wear bindis anymore.D.More men than women wear bindis in India.The Hunan Satellite TV(HNTV) show “Where are we going, Dad?” is a big hit. Many famous stars brought their children to a strange village alone, and they had to spend 72 hours with their children there. The program fully showed us a modern version of the “how to be a good father”. As the young parents today are too busy to take care of their children, this new form of “Lost on the way” played by nanny Daddy and cute kids triggered(触发)a lot of people’s emotional resonance(共鸣). Both the kids and their parents will find that their hearts are being drawn closer. But this kind of feeling has just proved that there is a big spiritual barrier between the modern parents and children.The TV shows like “Children are hard to support!”, “Where are we going, Dad?”, “hot mom” and “cute kids” are becoming more and more popular. All of these show the new parents’ confusion in children’s education and the appeal for the balance between career and family.In real life, on the one hand the young parents feel helpless because they are too busy to accompany their children under the pressures of work and life; on the other hand they continue to do so. The data collected by HNTV shows that nearly two-thirds of their audience are female, among whom 36% are aged from 25 to 34.We can imagine such a scene that one evening a young mother is watching the show with her young children, while her husband is still at work or trapped in socializing, or maybe is just playing computer games in the bedroom. The story of a child without the company of father is still going on. In fact, it is sometimes the same to mothers. In a modern family, it is often the old who take the responsibility of raising a child. The participation of mother in the children’s education is also very low.It is just this kind of confusion where the parents have gone in the modern family education, and where the parents will guide their children to go that “Where are we going,Dad?” shows us. If a child wants to grow up healthily and safely into a modern citizen with independent personality and free spirit, it is very important for him or her to follow the parents who serve as their first teacher. Maybe this is the real reason why such kind of TV programs could get hot. The truth is that children will go where their parents go; and society will go where the children go.12.In raising a child in modern society, parents should ________.A.play computer games with their childrenB.keep their children at home to avoid socializingC.balance well between family and careerD.break down the barrier between children and teachers13.Which of the following can be inferred in the passage?A.Parents shouldn’t entirely leave the education of children to the old.B.36% of the audience of the program are female aged from 25-34.C.The program shows us the confusion where the parents and children will go to play. D.In a modern family it is often mothers who are responsible for raising a child. 14.Which one is the best title of the passage?A.Confusion Behind “Where are we going, dad?”B.Modern Education is ImportantC.Nanny Daddy and Cute KidsD.New problems in Modern Children’s Education15.What attitude towards modern family education does the author express in the second paragraph?A.Proud. B.Worried.C.Optimistic. D.Indifferent.二、完形填空The measure of a man’s real character is what he would do if he knew he would never be found out.----Thomas Macaulay About thirty years ago, I was studying in a public school in New York. One day, Mrs Nanette O’Neill gave a maths 16 to our class. When the papers were 17 she discovered that twelve boys had made exactly the 18 mistakes throughout the test.There is nothing really new about 19 in exams. Perhaps that was 20 Mrs O’Neill didn’t even say a word about it. She only asked the twelve boys to 21 after class.I was one of the twelve.Mrs O’Neill asked22 questi ons, and she didn’t 23 us either. Instead, she wrote on the blackboard the 24 words by Thomas Macaulay. She then ordered us tocopy these words into our exercise-books one hundred times.I don’t know about the other eleven boys. Speaking for 25 I can say it was the most important single 26 of my life. Thirty years after being introduced to Macaulay’s words, they 27 seem to me the best yardstick (准绳), because they give us a 28 to measure ourselves rather than others.29 of us are asked to make 30 decisions about nations going to war or armies going to battle. But all of us are called 31 daily to make a great many personal decisions. Should the wallet, 32 in the street, be put into a pocket or 33 to the policeman? Should the 34 change received at the store be forgotten or 35 ? Nobody will know except you. But you have to live with yourself, and it is always better to live with someone you respect.16.A.paper B.question C.test D.problem 17.A.marked B.completed C.examined D.answered 18.A.easy B.same C.funny D.serious 19.A.lying B.discussing C.guessing D.cheating 20.A.because B.when C.why D.how 21.A.remain B.apologize C.come D.leave 22.A.many B.certain C.no D.more 23.A.excuse B.reject C.help D.scold 24.A.above B.common C.following D.unusual 25.A.herself B.ourselves C.themselves D.myself 26.A.chance B.incident C.lesson D.memory 27.A.still B.even C.always D.almost 28.A.reason B.sentence C.choice D.way 29.A.All B.Few C.Some D.None 30.A.quick B.wise C.great D.personal 31.A.upon B.out C.for D.up 32.A.finding B.found C.find D.founded 33.A.turned up B.turned on C.turned over D.turned back 34.A.small B.extra C.some D.necessary 35.A.paid B.remembered C.shared D.returned第II卷(非选择题)三、七选五Some people never master the art of being patient, and at times, all of us struggle with being patient. Sometimes a certain situation or a certain person just pushes our buttons, making it much more difficult for us to remain patient.36.It becomes harder to concentrate, and it becomes harder to be polite to other people.37.No one is born to be patient. As you learn and grow and experience things in life, you become wiser and learn how to interact with difficult kinds of people.38.This is normal, as you have never had the experience of working in an office before. At first, it might be difficult to understand your job. You might even lose patience, but over time you’ll be able to interact with other people with more confidence and patience. Some one at work disagrees with you, and it might make you become anxious.39.You’ll be less likely to become bothered when presented with different situations. Though it might be difficult, you should try to be patient in life. This will help you in nearly all situations. 40.Age doesn’t always mean that someone is wise, and wisdom doesn’t always mean that someone is patient, though the two often go hand in hand.A.You must keep in mind that patience comes with experience and wisdom.B.Once you lose patience, things tend to go wrong.C.Learning to be patient takes time and it takes patience to learn to be patient. D.Patience is acquired as you acquire wisdom, and wisdom is the child of experience. E.However, with experience, you’ll learn how to present your opinions clearly.F.The more patience you have, the better you’ll cope in various situations..G.For example, you start your first job in a big office, and you don’t really know how to work with lots of people.四、语法填空阅读下面材料,在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。
辽宁省葫芦岛市2020届高三下学期第一次模拟考试数学(文)试题
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2020年葫芦岛市普通高中高三第一次模拟考试数学(供文科考生使用)第Ⅰ卷(选择题,共60分)一、选择题:本题共12个小题,每小题5分,共60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.1.在复平面内,复数(1)(2)=+-z i i 对应的点位于( ) A .第一象限B .第二象限C .第三象限D .第四象限2.{2,3}=A ,{}2|30=∈-<B x N x x ,则=U A B ( ) A .{1,2,3}B .{0,1,2,}C .{0,2,3}D .{0,1,2,3}3.已知向量(2,3)=-a ,(3,)=b m ,且//a b ,则=m ( )A .2-B .2C .92-D .924.某地区甲、乙、丙、丁四所高中分别有120,150,180,150名高三学生参加某次数学调研考试.为了解学生能力水平,现制定以下两种卷面分析方案:方案①:从这600名学生的试卷中抽取一个容量为200的样本进行分析;方案②:丙校参加调研考试的学生中有30名数学培优生,从这些培优生的试卷中抽取10份试卷进行分析.完成这两种方案宜采用的抽样方法依次是( ) A .分层抽样法、系统抽样法 B .分层抽样法、简单随机抽样法 C .系统抽样法、分层抽样法D .简单随机抽样法、分层抽样法5.从2名男同学和3名女同学中任选2人参加社区服务,则选中的恰有一名女同学的概率为( ) A .0.3B .0.4C .0.5D .0.66.执行如图所示的程序框图,则输出的a 值为( )A .3-B .13C .12-D .27.我国古代名著《九章算术》中有这样一段话:“今有金锤,长五尺,斩本一尺,重四斤.斩末一尺,重二斤.”意思是:“现有一根金锤,长度为5尺,头部的1尺,重4斤;尾部的1尺,重2斤;且从头到尾,每一尺的重量构成等差数列.”则下列说法正确的是( ) A .该金锤中间一尺重3.5斤 B .中间三尺的重量和是头尾两尺重量和的3倍 C .该金锤的重量为15斤D .该金锤相邻两尺的重量之差的为1.5斤8.已知命题:∀∈p x R ,210-+≥x x ;命题:q 若22>a b ,则>a b .下列命题为真命题的是( ) A .∧p qB .∧⌝p qC .⌝∧p qD .⌝∧⌝p q9.如图,网格纸上小正方形的边长为1,粗线画出的是某多面体的三视图,则该多面体外接球的表面积为( )A .12πB .6πC .D .3π10.函数2()1sin 1⎛⎫=-⎪+⎝⎭xf x x e 图象的大致形状是( )A .B .C .D .11.已知双曲线2222:1(0,0)-=>>x y C a b a b的两个焦点为1F ,2F ,过1F 且与x 轴垂直的直线交C 的渐近线于A ,B 两点.若2△ABF 为直角三角形,则双曲线C 的离心率为( ) ABCD.212.关于x 的方程0114-=+-+t xx t x t有四个不同的实数根,且1234<<<x x x x ,则()()3412-+-x x x x 的取值范围( )A.B.4+ C.(4+ D.第Ⅱ卷(非选择题,共90分)二、填空题:本大题共4个小题,每小题5分,共20分. 13.函数()2()ln 28=+-f x x x 的单调递增区间是 .14.设变量x ,y 满足约束条件02360-≥⎧⎪+≥⎨⎪--≤⎩x y x y x y ,则2=-z x y 的最小值为 .15.已知,∈a b R ,且240-+=a b ,则139+ab 的最小值为 . 16.已知∈m R ,函数2223,0()2()1,0⎧++-≤=⎨-+-->⎩x x m x f x x x m x ,若对任意[3,)∈-+∞x ,()1≤-f x x ,恒成立,则m 的取值范围是 .三、解答题:本大题共6小题,共70分,解答应写出文字说明,证明过程或演算步骤. 17.已知函数1()sin cos ()64π⎛⎫=⋅--∈ ⎪⎝⎭f x x x x R . (1)求6π⎛⎫⎪⎝⎭f 的值和()f x 的最小正周期;(2)设锐角△ABC 的三边a ,b ,c 所对的角分别为A ,B ,C ,且124⎛⎫= ⎪⎝⎭A f ,2=a ,求+b c 的取值范围.18.如图,在三棱柱111-ABC A B C 中,1⊥A A 平面ABC ,D ,E 分别是线段AB ,1BB 的中点.(1)证明:1//BC 平面1A CD ;(2)当三棱柱的各棱长均为2时,求三棱锥1-C A DE 的体积.19.2020年是具有里程碑意义的一年,我们将全面建成小康社会,实现第一个百年奋斗目标;2020年也是脱贫攻坚决战决胜之年。
2020届辽宁省葫芦岛市高三下学期第一次模拟考试英语试题 扫描版含答案
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葫芦岛市2020年普通高中高三第一次模拟考试英语参考答案听力1—5 CABCB 6—10 ABBCA 11—15 CBBCC 16—20 AAACB阅读理解21—24 BCAD 25—27 DBC 28—31 CBAD 32—35 CADB 36—40 FAGEC完形填空41—45 CBDAC 46—50 DCBAD 51—55 ACDAB 56—60 BDACB语法填空61.various 62. visited 63. to reduce 64. who / that 65. on66. impression 67. sent 68. the 69. physicians 70. itself短文改错DoorDash is an app that people order food without having to call a phone number or finding correctwherechanges to pay the driver. Many people complain that order food for delivery is a pain becausechange orderingthe phone is always busier. For the convenience of customers,DoorDash provide an easy-to-usebusy providesmenu and an ordering system for each restaurant in its network. You pay right in your smarton/withphone. What is unusual about DoorDash is ∧you can track from where your driver is. However,that Therefore/Thusyou know how long you have to wait. Best of all, you get a same price as you order from thetherestaurant!书面表达Dear Mr.Smith,I’m Li Hua,writing to apply to be a member of our school English drama society. I have confidence that I am a suitable candidate for the society.To begin with, I am enthusiastic about dramas, especially about English dramas and started playing in junior high school. In addition, I have taken part in several drama plays and performed well. Last but not least, I’m fluent in English and won the first place in the English speech contest held in our city last year.I really hope to join you. I would appreciate it if you could reply to me at your earliest convenience.Yours,Li Hua。
2020届辽宁省葫芦岛市高三下学期第一次模拟考试数学(理)试题(wd无答案)
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(★★★★)12.关于 的方程 有四个不同的实数根,且 ,则 的取值范围()
A.
B.
C.
D.
二、填空题
(★★)13. 被7除后的余数为__________.
(★★)14.设变量 , 满足约束条件 ,则 的最小值为__________.
(★★★)15.已知数列 满足 , 为数列 的前 项和,则满足不等式 的 的最大值为__________.
(★★★★)16.关于 的方程 有两个不等实根,则实数 的取值范围是___________.
三、解答题
(★★★)17.已知函数 .
(1)求 的值和 的最小正周期;
(2)设锐角 的三边 , , 所对的角分别为 , , ,且 , ,求 的取值范围.
(★★★)18.如图,在三棱柱 中, 平面 , , .
(1)求证: 平面 ;
A.150种
B.360种
C.510种
D.512种
(★★)7. “ ”是“直线 与圆 相切”的()
A.充分而不必要条件
B.必要而不充分条件
C.充分必要条件
D.既不充分也不必要条件
(★★)8.从标有数字1,2,3,4,5的五张卡片中,依次抽出2张(取后不放回),则在第一次抽到卡片是偶数的情况下,第二次抽到卡片是奇数的概率为()
①可能用到的数据:
②参考公式:线性回归方程 中,
(★★★)20.已知椭圆 : 离心率是 分别是椭圆 的左、右焦点,过 作斜率为 的直线 ,交椭圆 于 , 两点,且三角形 周长
(1)求椭圆 的标准方程;
(2)若直线 分别交 轴于不同的两点 , .如果 为锐角,求 的取值范围.
(★★★★)21.已知函数 .
(2)求异面直线 ,且 ,点 在线段 上,若 平面 ,求 的值(用含 的代数式表示).
2020届辽宁省葫芦岛市普通高中高三毕业班下学期第一次高考模拟考试英语试题(解析版)
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绝密★启用前辽宁省葫芦岛市普通高中2020届高三毕业班下学期第一次高考模拟考试英语试题(解析版)注意事项:1.本试卷分Ⅰ卷、Ⅱ卷两部分,满分:150分;考试时间:120分钟。
2.答题前,考生务必将自己的姓名、考号填写在答题卡上。
3.选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其它答案标号。
不能答在本试卷上,否则无效。
第Ⅰ卷第一部分听力(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。
每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
1. When are the two speakers going to the school?A. On Saturday’s morning.B. On Sunday’s afternoon.C. On Saturday’s afternoon.2. Where does the man come from?A. America.B. England.C. Japan.3. What does the woman suggest the man do?A. Not smoke so heavily.B. Give up smoking.C. Take more exercise.4. What is the woman looking for?A. A friend’s house.B. A restaurant.C. A single room for night.5. When does the Boeing 747 leave for New York?A. At 805.B. At 845.C. At 855.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。
2020年5月7日辽宁省葫芦岛市普通高中2020届高三下学期第一次高考模拟考试文综地理答案
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绝密★启用前
辽宁省葫芦岛市普通高中
2020届高三毕业班下学期第一次高考模拟考试文综-地理试题参考答案
2020年5月7日1~5 D C C B C
6~11 D B A A D C
36.(24分)
(1)流速加快;径流量增大;河水含沙量增大;洪峰提前。
(每点1分,共4分)
(2)灌木适合当地的干旱环境;提高植被对水土保持的能力;增加和保持生物多样性。
(每点2分,共6分)
(3)山体坡度保持稳定;水土流失得到控制;内部管道保护完好;地表植被得以恢复。
(任答3点,得6分)
(4)地处内陆的温带季风气候区,年降水量较少;坡度较大,地表径流快,地表存水量少;位于阳坡,夏秋季光热充足,地表蒸发量大;位于冬季风背风坡,冬季降雪较少,冬春季节干旱;海拔高,地处偏远,难以进行人工灌溉和养护;土壤干旱,地下水位低。
(任答4点,得8分,言之有理,可酌情给分)
37. (22分)
(1)巴西纬度低,大部分地区气候炎热(2分);巴西人口众多(2分);经济发展速度快,水平较高(2分)对空调的需求大。
(2)巴西土地成本低、劳动力丰富而廉价,生成本降低(2分);规避关税,降低成本(2分);靠近市场,降低运输成本(2分);更灵活应对当地市场变化(2分)。
(任答3点得6分)
1。
2020届辽宁省葫芦岛市普通高中高三毕业班下学期第一次高考模拟考试数学(文)试题(解析版)
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绝密★启用前辽宁省葫芦岛市普通高中2020届高三毕业班下学期第一次高考模拟考试数学(文)试题(解析版)注意事项:1.本试卷分第Ⅰ卷、第Ⅱ卷两部分,共6页.满分150分;考试时间:120分钟.2.答题前,考生务必将自己的姓名、准考证号、考试科目、试卷类型用2B 铅笔涂在答题卡上.3.用铅笔把第Ⅰ卷的答案涂在答题卡上,用钢笔或圆珠笔把第Ⅱ卷的答案写在答题纸的相应位置上.4.考试结来,将答题卡和答题纸一并交回.第Ⅰ卷(选择题,共60分)一、选择题:本题共12个小题,每小题5分,共60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.1. 在复平面内,复数(1i)(2i)z =+-对应的点位于( )A. 第一象限B. 第二象限C. 第三象限D. 第四象限 【答案】A【解析】试题分析:(1)(2)3z i i i =+-=+,∴对应的点为(3,1),位于第一象限. 考点:复数的乘除和乘方.2. {2,3}A =,{}2|30=∈-<B x N x x ,则A B =( ) A. {1,2,3}B. {0,1,2,}C. {0,2,3}D. {0,1,2,3}【答案】A【解析】【分析】根据一元二次不等式的运算求出集合B ,再根据并集运算即可求出结果.【详解】因为{}2|30=∈-<B x N x x ,所以{}1,2B =,所以{1,2,3}A B .故选:A.【点睛】本题主要考查了集合的并集运算,属于基础题.3. 已知向量()2,3a =-,()3,b m =且a b ,则m =( )A. 2-B. 2C. 92-D. 92【答案】C【解析】【分析】由向量平行的坐标公式,即可求得. 【详解】a b ,(2,3)a =-,(3,)b m =,∴290m --=,解得92m =-, 故选:C.【点睛】本题考查向量平行的坐标公式,属于基础题.一般地,如果11,a x y ,()22,b x y =,若a b ,则12210x y x y -=.4. 某地区甲、乙、丙、丁四所高中分别有120,150,180,150名高三学生参加某次数学调研考试,为了解学生能力水平,现制定以下两种卷面分析方案:方案①;从这600名学生的试卷中抽取一个容量为200的样本进行分析:方案②:丙校参加调研考试的学生中有30名数学培优生,从这些培优生的试卷中抽取10份试看进行分析.完成这两种方案宜采用的抽样方法依次是( )A. 分层抽样法、系统抽样法B. 分层抽样法、简单随机抽样法C. 系统抽样法、分层抽样法D. 简单随机抽样法、分层抽样法。
辽宁省葫芦岛市2020届高三下学期第一次模拟考试文科综合试题 扫描版含答案
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辽宁省葫芦岛市2020届高三下学期第一次模拟考试2020年政治一模参考答案及评分标准2020年5月7日一、单项选择题12——16 DBCAC 17——21 BDABB 22——23 AD二、非选择题:38.(14分)①科学的宏观调控是发挥社会主义市场经济体制优势的内在要求。
党和政府采取积极的财政政策,有针对性的减税降费,有利于保障各地抗击疫情提供资金保障,减轻企业负担。
(4分)②货币政策是国家进行宏观调控的重要经济工具。
抗击疫情,恢复经济应当强化金融政策支持,引导市场贷款利率下调,降低企业融资成本。
(4分)③非公有制经济是社会主义市场经济的重要组成部分,是我国经济社会发展的重要基础。
抗击疫情完善支持中小微企业有利于促进经济的恢复和发展,稳定就业。
(4分)④要大力发展实体经济,筑牢现代化经济体系的坚实基础。
要在确保做好防疫工作的前提下,分类指导,有序推动央企、国企等各类企业复工复产,为经济发展夯实基础。
(物质资料生产是人类社会的基础,必须大力发展生产)(2分)39.(12分)①坚持和完善党的领导制度体系。
中国共产党领导是中国特色社会主义最本质的特征,是中国特色社会主义制度的最大优势,科学依法部署疫情防控工作,完善重大疫情防控体制机制,健全国家公共卫生应急管理体系。
(2分)②坚持以人民为中心思想,尊重人民主体地位,高度重视人民群众生命安全和身体健康,紧紧依靠人民群众坚决打赢疫情防控阻击战,实现最广大人民的根本利益。
(2分)③坚持和完善中国特色社会主义法治体系。
坚持依法防控,构建系统完备、科学规范、运行有效的疫情防控法律体系。
(2分)④坚持和完善中国特色社会主义行政体制,构建职责明确、依法行政的政府治理体系,各级政府全面依法履行职责,提高依法行政水平,切实保障人民群众生命健康安全。
(2分)⑤坚持全国一盘棋,调动各方面的积极性,发挥集中力量办大事显著优势去打赢新冠疫情的人民战、阻击战。
(2分)⑥坚持独立自主的和平外交政策,积极构建人类命运共同体,新冠肺炎肆虐全球,各国携起手来,群防群控,信息公开,共享治疗的经验与作法。
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绝密★启用前
辽宁省葫芦岛市普通高中
2020届高三毕业班下学期第一次高考模拟考试
数学(理)试题
2020年5月6日注意事项:
1.本试卷分第I卷、第II卷两部分,共6页。
满分150分;考试时间:120分钟。
2.答题前,考生务必将自己的姓名、准考证号、考试科目、试卷类型用2B铅笔涂在答题卡上。
3.用铅笔把第I卷的答案涂在答题卡上,用钢笔或圆珠笔把第II卷的答案写在答题纸的相应位置上。
4.考试结束,将答题卡和答题纸一并交回。
第I卷(选择题,共60分)
一、选择题:本题共12个小题,每小题5分,共60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。
1.复数z满足z(1-i)=2i,则复数z=
A.1-i
B.1+2i
C.1+i
D.-1+i
2.设集合A={x|1≤x≤3},B={x|x2-2x-8<0},则A∪B=
A.{x|-2<x<4}
B.{x|1≤x<2}
C.{x|-4<x≤3}
D.{x|1≤x<4}
3.已知向量a=(-2,3),b=(3,m),且a//b,则m=
A.-2
B.2
C.-9
2
D.
9
2
4.某地区甲、乙、丙、丁四所高中分别有120,150,180,150名高三学生参加某次数学调研考试。
为了解学生能力水平,现制定以下两种卷面分析方案:方案①:从这600名学生的试卷中抽取一个容量为200的样本进行分析;方案②:丙校参加调研考试的学生中有30名数学培优生,从这些培优生的试卷中抽取10份试卷进行分析。
完成这两种方案宜采用的抽样方法依次是A.分层抽样法、系统抽样法 B.分层抽样法、简单随机抽样法
C.系统抽样法、分层抽样法
D.简单随机抽样法、分层抽样法
5.执行如图所示的程序框图,则输出的a值为
A.-3
B.1
3
C.
1
2
D.2
6.某校在高二年级开设选修课,选课结束后,有6名同学要求改选历史,现历史选修课开有三个班,若每个班至多可再接收3名同学,那么不同的接收方案共有
A.150种
B.360种
C.510种
D.512种
7.“k=0”是“直线y=kx2与圆x2+y2=2相切”的
A.充分而不必要条件
B.必要而不充分条件
C.充分必要条件
D.既不充分也不必要条件
8.从标有数字1,2,3,4,5的五张卡片中,依次抽出2张(取后不放回),则在第一次抽到卡片是偶数的情况下,第二次抽到卡片是奇数的概率为
A.1
4
B.
2
3
C.
3
4
D.
1
2
9.如图一几何体三视图如图所示,则该几何体外接球表面积是。