专项提分卷(四)
人教版语文八年级下专题训练 专项提分卷(四) 语言运用——标点符号(带答案)
专项提分卷(四) 语言运用——标点符号(满分：45分考试时间：40分钟)1．语言运用——下列句子标点符号使用正确的一项是(C)(3分)A．如何让古典音乐走进普通人的生活并深入人们的内心。
一些老艺术家分享了自己工作中的经验与感悟。
B．文艺工作者只有真正深入生活并紧跟时代步伐，才可能创作出有温度，有深度，有高度的优秀作品。
C．原始人类阅读的对象就是大自然：山峦在蔚蓝的天空下寂静绵延，野鹿在蜿蜒的溪流旁悠闲漫步。
D．历史正剧往往庄重严整，因为它倾向于真实再现，历史传奇常常灵动丰盈，因为它有较多理想色彩。
(解析：A项第一个句号改为问号；B项“有温度，有深度，有高度的”，将逗号改为顿号；D项“真实再现”后面的逗号应改为分号。
)2．语言运用——下列句子标点符号使用正确的一项是(C)(3分)A．如果人云亦云，别人说什么，我们就说什么？我们跟学舌的鹦鹉有什么区别呢？B．导演杨洁在拍摄《西游记》时，认为“取经女儿国”一集的情节可以有一段插曲，她决定把作词的任务交给词作家阎肃。
C．中国的BAT(百度、阿里巴巴、腾讯)及其投资或控股的公司，几乎掌握了中国人日常生活和工作的一切。
D．屈原在诗句：“唯草木之零落兮，恐美人之迟暮”中，以美人自比，隐喻楚怀王听信谗言，将他流放到外地，使他的才能没有施展之机，恰似“美人迟暮”。
(解析：A项第一个问号应改为逗号；B项“取经女儿国”是电视剧剧集名，应为书名号；D项引文作为句子的一部分，前面不用冒号。
)3．语言运用——下列句子标点符号使用正确的一项是(C)(3分)A．是天气比往年热呢？还是自己的身体虚呢？这么一想，他忽然不那么昏昏沉沉的了，心中仿佛凉了一下。
B．“简，”我们走上月桂小径，慢慢地朝坍塌的篱笆和七叶树的方向闲荡过去，他说：“桑菲尔德在夏天是个可爱的地方，是不是？”C．光有理性而没有感情，固然不能表达音乐；有了一般的感情，而不是那种火热的同时又是高尚、精练的感情，还是要流于庸俗。
(河北专版)2019中考语文总复习词语(含成语)的理解与运用;病句的辨析与修改
专项提分卷(四) 词语(含成语)的理解与运用；病句的辨析与修改(时间：40分钟满分：50分)一、词语(含成语)的理解与运用(12分)1．(2018·巴中)依次填入下列横线的词语最恰当的一项是(A)(2分)面对文化传承创新这张有难度的时代考卷，我们不仅要善于做好选择题，敢于做好应用题，还要精于做好综合题。
中华优秀传统文化是中华民族智慧结晶，她________个体心灵、________民族精神、________民众心智，________中华民族数千年坚毅前行。
A．安顿振奋启迪引领B．启迪引领安顿振奋C．安顿引领振奋启迪D．启迪安顿振奋引领2．(2018·孝感)选出依次填入横线上最恰当的一组词语(A)(2分)我们读所有的书，最终的目的都是读自己。
读有益的书，你会发现________的心平息下来了，有种________的感觉，你会发现你百思不得其解的________，千百年来被无数的人思考过，并且提供了各种各样的答案。
每一本在你心目中值得阅读和记住的书，都是因为其中________着未来你更期待的那个自己。
A．焦躁豁然开朗困惑蕴藏B．焦虑豁然开朗疑惑蕴含C．焦躁茅塞顿开困惑蕴含D．焦虑茅塞顿开疑惑蕴藏3．(2018·沈阳)依次填入下面句子横线处的词语最恰当的一项是(B)(2分)“天地英雄气，千秋尚凛然。
”________哪一个时代，英雄的事迹和精神都是________社会前行的强大力量。
期盼“崇尚英雄”________，光荣永远________，英雄永不独行。
A．尽管勉励蔚为大观传递B．无论激励蔚然成风传承C．尽管激励蔚为大观传递D．无论勉励蔚然成风传承4．下列句子中，加着重号的成语使用不正确的一项是(B)(2分)A．在治安不好的年代，火车站人流量大，容易成为藏污纳垢．．．．的地方。
B．广场上音乐响起，老人们翩翩起舞，沉浸在天伦之乐．．．．的喜悦中。
C．交响音乐会上，大家正襟危坐．．．．，静静聆听，倾心领悟。
中考英语总复习考试提分特训题型专项训练四补全对话完成句子和书面表达
题型专项训练四补全对话、完成句子和书面表达补全对话根据对话内容,从方框内选择恰当的句子将对话补充完整。
(选项中有两项是多余的)AA.What kind of animals will we see there?B.Yes,I’ve got a map.C.No,we don’t.D.What do you know about the reserve?E.Yes.That’s right.F.Don’t worry.G.That’s a good idea.Tom and Peter are talking about their visit to the nature reserve(自然保护区).Tom:We have to meet the others at 8:30 at the reserve,don’t we?Peter:1.Tom:Do you know how to get there?Peter:2. It’ll take us about two hours to get there by bus.Tom:3.Peter:It’s an area that protects lots of different animals.Tom:4.Peter:I’m not really sure.I know there are different kinds of birds there and I’m going to take my camera with me.Tom:5. What clothes are you going to wear?Peter:Well,if it’s wet,I’ll wear my sports shoes and take my raincoat with me. Tom:So will I.答案:1~5 EBDAGBA.Not much.B.I’m afraid so.C.Yes,very much.D.It’s not a big deal.E.Of course you should.F.What did you argue about?G.I shouldn’t have argued with him.A:I had a big argument with David yesterday.I hope he’s not still mad at me.B:1.A:He borrowed some money from me and I needed it back.He said he didn’t have the money yet.B:Well,he should pay back.A:He probably thought that I didn’t believe in him.2.B:Did you lend him a lot of money?A:3. But I had to buy a gift for my mother,so I needed the money.B:Well,talk to him about it next time you see him.He probably feels as bad about it as you do.Close friends sometimes have disagreement.4.A:I guess you’re r ight.We should patch things up.B:5. You wouldn’t want a silly argument to end a long friendship,would you? A:Sure.答案:1~5 FGADECA:Excuse me,sir.1.B:Certainly,go along this street.Turn left into Xingfu Street,and the museum is on your right.A:2.B:It’s about thirty minutes.A:I see.3.B:Yes,you can.A No.103 bus will take you there.A:4.B:Over there.Look!The bus is coming.A:Thank you very much.B:5.答案:1~5 GDCFBDA:Hi,Tom!You look very happy today!B:Oh,yes.Guess what?My best friend Ben is coming.A:Oh,really?1.B:Tomorrow.I can’t wait to see him.A:2.B:For two weeks.A:3.B:He is really friendly.I’m sure you will like him when you see him.A:What does he look like?B:4. He plays football well.A:Could you introduce him to me?B:5.答案:1~5 CAEFB完成句子根据所给中文意思完成句子,每空限填一词。
2021年小升初英语 补全对话 专项提分卷(四) 含答案解析
2021年小升初英语补全对话专项提分卷(四) 含答案解析姓名：__________ 班级：__________考号：__________一、补全对话（共10题；共50分）1.补全对话Mike: Hi, Judy. What are you going to do this weekend?Judy: ________ Do you want to go with me?Mike: No, thank you. ________Judy: What are you gonging to do this weekend?Mike: I'm going to see a film.Judy: ________Mike: I'd like to see Black Horse.Judy: ________Mike: It's a story about a brave horse and some policemen.Judy: Wow! That sounds exciting! ________Mike: Good idea!2.选句子完成对话Alice: What are you going to do this weekend?Ben: ________Alice: ________Ben: Peter and I would like to see Superbaby, but Jill wants to see The Monkey King.Alice: Which film are you going to see then?Ben: ________ It's an interesting film.Alice: ________Ben: ________Would you like to go with us. Alice?Alice: Yes. I'd like to go with you. I like this film.Ben: Great! Let's go and see it.3.从方框中选择合适的句子，补全对话。
2021年中考数学分类专题提分训练(四)：圆周角定理填空题
微专题之圆周角定理填空题专项：2021年中考数学分类专题提分训练（四）1．如图，BD是⊙O的直径，点A、C在圆周上，∠CBD＝20°，则∠A的度数为．2．如图，AB是⊙O的直径，C是⊙O上一点，∠ACB的平分线交⊙O于D，且AB＝10，则AD 的长为．3．如图，已知⊙O的两条弦AC，BD相交于点E，∠A＝70°，∠C＝50°，则∠AEB的度数为．4．如图，A是⊙O上一点，BC是直径，AC＝2，AB＝4，点D在⊙O上且平分，则DC的长为．5．如图，已知圆周角∠ACB＝130°，则圆心角∠AOB＝．6．如图，在平面直角坐标系中，半径为3的⊙A经过坐标原点O和点C（0，2），B是y轴左侧⊙A优弧上一点，则sin B的值为．7．已知：如图，AB是⊙O的直径，BD＝OB，∠CAB＝30°．请根据已知条件和所给图形，写出2个正确结论（除AO＝OB＝BD外）：．8．如图，在⊙O中，点A在上，∠BOC＝100°．则∠BAC＝°．9．如图，⊙O的直径CD⊥AB，∠A＝30°，则∠D＝．10．如图，线段AB是⊙O的直径，弦CD⊥AB，∠CAB＝20°，则∠AOD等于．11．如图，AB是⊙O的直径，C，D两点在⊙O上，∠BCD＝25°，则∠AOD的度数为．12．如图，四边形ABCD内接于⊙O，AB＝AD，∠C＝110°，点E在上，则∠E＝°．13．如图，点D（0，3），O（0，0），C（4，0），B在⊙A上，BD是⊙A的一条弦．则sin ∠OBD＝．14．圆的弦长等于半径，则这条弦所对的圆周角是．15．如图点A，B在⊙O上，CD是它的直径，若∠B＝25°，则∠ADC＝度．16．如图，扇形AOB中，∠AOB＝90°，OA＝4，点C在弦AB上，且AC＝，点D在弧AB 上，且CD∥OB，则CD＝．17．如图，已知A、B、C分别是⊙O上的点，∠B＝120°，P是直径CD的延长线上的一点，且AP＝AC，PD＝2，求AP的长为．18．如图，半径为10的⊙A中，弦BC、ED所对的圆心角分别是∠BAC、∠EAD．已知DE＝12，∠BAC+∠EAD＝180°，则弦BC等于．19．如图，AB是⊙O的直径，点C和点D是⊙O上位于直径AB两侧的点，连结AC，AD，BD，CD，若⊙O的半径是5，BD＝8，则sin∠ACD的值是．20．如图，若AB是⊙O的直径，CD是⊙O的弦，∠ABD＝55°，则∠BCD＝°．21．如图，⊙O内有一条弦BC，A为⊙O内一点、其中OA＝3，AB＝4，∠A＝∠B＝60°，则弦BC的长为．22．在半径为1的⊙O中，弦AB的长为，弦AC的长为1，则∠CAB的度数为．23．如图，▱BCDE的顶点B、C、D在半圆O上，顶点E在直径AB上，连接AD，若∠CDE＝68°，则∠ADE的度数为°．24．如图，在⊙O中，CD是直径，弦AB⊥CD，垂足为点E，连结BC．若AB＝2，∠BCD＝22°30′，则⊙O的半径为．25．如图，⊙O中，弦BC与半径OA相交于点D．若∠A＝60°，∠ADC＝88°，则∠C的度数是．参考答案1．解：∵BD是⊙O的直径，∴∠BCD＝90°（直径所对的圆周角是直角），∵∠CBD＝20°，∴∠D＝70°（直角三角形的两个锐角互余），∴∠A＝∠D＝70°（同弧所对的圆周角相等）；故答案是：70°．2．解：∵AB是⊙O的直径，∴∠ADB＝90°，∵∠ACB的平分线交⊙O于D，∴∠ACD＝∠BCD，∴＝，∴AD＝BD，∴△ABD为等腰直角三角形，∴AD＝AB＝10×＝5．故答案为5．3．解：∵∠B＝∠C＝50°，且∠A＝70°，∴∠AEB＝180°﹣∠A﹣∠B＝60°．故答案为：60°．4．解：∵A是⊙O上一点，BC是直径，∴∠BAC＝∠BDC＝90°，在Rt△ABC中，AC＝2，AB＝4，由勾股定理得：AB2+AC2＝BC2，即BC2＝22+42＝20，∵点D在⊙O上且平分，∴BD＝DC，∴在Rt△BDC中，由勾股定理得：BD2+DC2＝BC2，即2DC2＝BC2＝20，解得：DC＝，故答案为：．5．解：在优弧AB上取一点D，连接AD、BD，如图所示：∵∠ACB＝130°，∴∠ADB＝180°﹣∠ACB＝50°，∴∠AOB＝2∠ADB＝100°．故答案为：100°．6．解：⊙A与x轴的另一个交点为D，连接CD，如图，∵∠COD＝90°，∴CD为⊙A的直径，∴CD＝6，∵点C（0，2），∴OC＝2，在Rt△OCD中，sin D＝＝＝，∵∠B＝∠D，∴sin B＝．故答案为．7．解：连接OC，BC，∵AB是⊙O的直径，∴∠ACB＝90°，∵∠CAB＝30°，∴∠COB＝∠CBO＝60°，∴△OBC是等边三角形，∵BD＝OB，∴BD＝OB＝BC＝OC，∴∠D＝∠BCD＝∠CBO＝30°，∴∠A＝∠D，∠OCD＝90°，即OC⊥CD，∴AC＝DC，CD是⊙O的切线．故答案为：此题答案不唯一，如AC＝DC，CD是⊙O的切线等．8．解：如图，在优弧BC上取一点D，且异于B，C，连接BD，CD，则四边形ABDC是⊙O的内接四边形，∴∠D+∠BAC＝180°．∵∠BOC＝100°，∴∠D＝50°，∴∠BAC＝180°﹣50°＝130°，故答案为：130．9．解：∵⊙O的直径CD⊥AB，∠A＝30°，∴＝，∠AOC＝90°﹣∠A＝60°，∴∠D＝∠AOC＝30°．故答案为：30°．10．解：∵CD⊥AB，∴＝，∴∠BOD＝2∠CAB＝2×20°＝40°，∴∠AOD＝180°﹣∠BOD＝180°﹣40°＝140°．故答案为140°．11．解：∵∠BCD＝25°，∴∠BOD＝50°，∴∠BCD＝180°﹣50°＝130°．故答案为130°．12．解：∵∠BAD+∠C＝180°，而∠C＝110°，∴∠BAD＝180°﹣110°＝70°，∵AB＝AD，∴∠ABD＝∠ADB＝（180°﹣∠BAD）＝（180°﹣70°）＝55°，∵∠ABD+∠E＝180°，∴∠E＝180°﹣55°＝125°．故答案为125．13．解：∵D（0，3），C（4，0），∴OD＝3，OC＝4，∴CD＝5，连接CD，∵∠OBD＝∠OCD，∴sin∠OBD＝sin∠OCD＝＝．故答案为：．14．解：如图，AB为⊙O的弦，且AB＝OA，则△ABO为等边三角形，∴∠AOB＝60°，∴∠P＝30°，∴∠P′＝180°﹣∠P＝180°﹣30°＝150°．∠P、∠P′都是弦AB所对的圆周角．所以圆的弦长等于半径，则这条弦所对的圆周角是30°或150°．故答案为30°或150°．15．解：∵∠B＝25°，∴∠C＝25°，∵CD是直径，∴∠CAD＝90°，∴∠ADC＝90°﹣25°＝65°．故答案为65．16．解：延长DC交AO于点E，连接OD，∵CD∥OB，∴∠AEC＝∠AOB＝90°，∵OA＝OB，∴∠BAO＝45°，∵AC＝，∴AE＝CE＝1，∴EO＝4﹣1＝3，∵OD＝4，∴由勾股定理可知：DE＝，∴CD＝﹣1，故答案为：﹣117．解：连接AD、OA，∵∠B＝120°，∴∠ADC＝60°，∴∠ACD＝30°，又AP＝AC，∴∠P＝30°，∠DAP＝30°，∴AD＝PD＝2，则CD＝4，∵OA＝OD，∴∠OAD＝∠ADC＝60°，∴∠OAP＝90°，∴PA是⊙O的切线，∴PA2＝PD•PC＝12，则AP＝2，故答案为：2．18．解：作AH⊥BC于H，作直径CF，连结BF，如图，∵∠BAC+∠EAD＝180°，而∠BAC+∠BAF＝180°，∴∠DAE＝∠BAF，∴＝，∴DE＝BF＝12，∵AH⊥BC，∴CH＝BH，∵CA＝AF，∴AH为△CBF的中位线，∴AH＝BF＝6．∴BH＝＝＝8，∴BC＝2BH＝16．故答案为：16．19．解：∵AB是直径，∴∠ADB＝90°，∴AD＝＝＝6，∵∠ACD＝∠B，∴sin∠ACD＝sin∠B＝＝＝，故答案为．20．解：连接AD．∵AB是直径，∴∠ADB＝90°，∵∠ABD＝55°，∴∠A＝90°﹣55°＝35°，∴∠BCD＝∠A＝35°，故答案为35°．21．解：延长AO交BC于D，作OE⊥BC于E，∵∠A＝∠B＝60°，∴∠ADB＝60°，∴△ADB为等边三角形，∴BD＝AD＝AB＝4，∵OA＝3，∴OD＝1，又∵∠ADB＝60°，∴DE＝OD＝，∴BE＝3.5，∴BC＝2BE＝7，故答案为：7．22．解：作OD⊥AB于D，连接OC、OA、OB，如图，则AD＝BD＝AB＝，在Rt△OAD中，∵cos∠OAD＝＝，∴∠OAD＝30°，∵OA＝AC＝OC＝1，∴△OAC为等边三角形，∴∠OAC＝60°，当AC和AB在OA的两侧时，∠CAB＝∠OAC+∠OAB＝60°+30°＝90°；当AC和AB在OA的同侧时，∠CAB＝∠OAC﹣∠OAB＝60°﹣30°＝30°；综上所述，∠CAB的度数为30°或90°．故答案为30°或90°．23．解：∵四边形BCDE为平行四边形，∴∠B＝∠CDE＝68°，∵四边形ABCD为圆的内接四边形，∴∠B+∠ADC＝180°，∴∠ADC＝180°﹣68°＝112°，∴∠ADE＝∠ADC﹣∠CDE＝112°﹣68°＝44°．故答案为44．24．解：连接OB，如图所示：∵∠BCD＝22°30′，∴∠BOE＝2∠BCD＝45°，∵直径CD⊥弦AB，AB＝2，∴BE＝AB＝1，∠OEB＝90°，∴OB＝BE＝，即⊙O的半径为．故答案为：．25．解：∵∠ADC＝∠A+∠B，∠A＝60°，∠ADC＝88°，∴∠B＝28°，∴∠AOC＝2∠B＝56°，∵∠ADC＝∠AOC+∠C，∴∠C＝88°﹣56°＝32°．故答案为：32°．。
2019-2020【提分必做】八年级英语上册 专项训练 专题四 阅读理解 (新版)人教新目标版
专题四阅读理解Group 1A“My dear dad, where are we going？”This has become the most popular question these days. It's a line from the theme song of Hunan TV Station's reality show Where Are We Going, Dad?“All of my classmates are big fans，”said Ning Yun, 14, from Guangxi.“On Fridays, we remind others: don't forget to watch it tonight！”In the show, five pairs of fathers and kids go to different places and finish interesting jobs. It's all about growing up. Clumsy fathers learn to cook and look after their kids. The kids learn about teamwork and living and working by themselves. In the show, Kimi, four years old, finds it hard to finish his work alone.“When I saw Kimi looking for his dad, I can't help laughing，”said Chen Yufang, 13, from Guangxi.“It reminded me of my first night at the school dormitory. I really felt the pain of growing up that night.”When people see the fathers trying to help their kids, it also touches their hearts more or less. Tian Xiaofeng, for example, 14, from Jiangsu, said his father is like Guo Tao in the program.“He is really strict. And I was sad about it，” he said. But now he sees it in a different way，“Guo Tao's son looks strong－minded. I think his parents give him some good examples. And I guess my father just wants me to be like that，”he said.On the journey of life, kids learn to grow up and adults learn to be better parents. Maybe we can plan a trip with our parents. Shall we go?( B )1.According to the passage, Where Are We Going, Dad? is a ________．A．song B．showC．magazine D．movie( B )2.The third paragraph is mainly about________．A．when the games beginsB．what the program is aboutC．how fathers learn to cookD．where the children play( C )3.According to the passage, Kimi ________．A．does his work easilyB．comes from GuangxiC．is a 4－year－old kidD．enjoys living at school( A )4.The writer tells that the new program touches people's hearts by ________．A．giving an exampleB．making a surveyC．singing a songD．having a speech( C )5.We can learn from the passage that________．A．Guo Tao is very sorry for his sonB．children hardly do as their parents doC．Tian Xiaofeng's father is very strictD．kids can grow up well without parentsBHave you ever watched a film with your friends and thought，“How wonderful！”or had a meal with your family and said，“That was the best！”？Well, there may be a small secret(秘密)about why you enjoyed it so much. Our experiences are stronger if we share them with someone. That means good experiences become better, and bad ones become worse. That's according to a new study by Yale University.Scientists did a small study on female college students. In the test they share chocolate with someone they thought was another participant. But in fact, it was a scientist. In each test, they got two pieces of chocolate. They ate one piece at the same time with the“participant”and another piece alone. The participants thought the chocolate was tastier and more enjoyable when they shared it with someone. Even though both pieces of chocolate were from the same box.Scientists then did another experiment, this time with bitter,_unpleasant chocolate. Again, the participants thought the chocolate was bitterer than the piece they ate alone.“When people think of shared experience, what usually comes to mind is being with friends or family，”said scientist Erica Boothby. We often don't know how much people around influence(影响) our decisions, according to Erica.However, it does show that sharing things with a friend may just make your good way a little brighter. Because the study only looked at female college students, it doesn't mean the whole picture.( B )1.According to the new study，________．A．the best film is the one you watch with your friendsB．sharing secrets with your friends can make you happierC．the most delicious meal is the one you have with your familyD．your experiences are stronger if you share them with others( A )2.Which of the following statements is WRONG to the test?A．The chocolate has two different tastes.B．The scientists also take part in the test.C．The chocolate is from the same box.D．The participants were female college students.( A )3.The underlined word“bitter” in Paragraph 4 probably is________．A．a kind of taste B．a kind of colorC．bright D．tidy( D )4.We can learn from the last two paragraphs________．A．Erica Boothby really likes eating chocolateB．making more friends can make you luckierC．boys don't like to do things with their friendsD．friends or family play a role in our decisions( B )5.Which is the best title for this passage?A．Eating Chocolate Lets Us Be HappierB．Sharing Things Makes a DifferenceC．Watching a Movie Brings us LuckD．Doing a Study Is Really InterestingGroup 2AAnnie White likes music. She is learning to play the piano, but the Whites don't have a piano at home. A neighbor has an old piano and she says that Annie can have it.It is a Sunday morning. Mr. White and three neighbors take the piano to the Whites' house. Now Annie is very happy. Annie's baby sister Jane also likes the piano, because she can make a lot of noise on it. In the evening, Mr. and Mrs. White go to a party. Little Jane wants to play the piano, but Annie says，“No, Jane. You must go to bed now.”So Jane goes to be d. Then Annie does her homework and watches TV. At nine o'clock she goes to bed, too.But what is that? She sits up in bed and listens. It is her piano. Someone is playing it. Well, in fact, someone is making a lot of noise on it! It is Jane, of course! Annie jumps out of bed and runs into the living room quickly. But there is no one there. Annie goes to Jane's room. Jane is in bed. She is sleeping.Then Annie hears the piano again! Who can it be? Are her parents back? She calls，“Are you there, Mom and Dad？”There is no answer.Now Annie is▲. Someone is playing her piano. It isn't her sister and it isn't her father or her mother. Who can that mysterious(神秘的)piano player be? With all her courage (勇气)，she goes to the living room again. She walks slowly and quietly. Do you know what she sees? Puddles, the family cat, is walking up and down the piano! ( C )1.Annie's piano is from her________．A．mother B．teacherC．neighbor D．grandfather( A )2.The best word for“▲”is ________．A．afraid B．funnyC．happy D．sad( D )3.Which of the following is TRUE according to the passage?A．Annie and her sister share a room.B．The piano is in Annie's mother's room.C．Annie goes to bed at ten o'clock in the evening.D．At first, Annie thinks her sister is playing the piano.( D )4.What is the best title for this passage?A．A Happy FamilyB．A Wonderful NightC．A Lazy But Cute CatD．A Mysterious Piano PlayerBAmerican scientists say the ice covering the Arctic (北极的)Ocean is getting lessand thinner. This is very bad for the animals living there. The scientists found that older, thicker sea ice was replaced (替换)with new ice day after day. The new ice is thinner and it melts faster than the older ice.The study found an average (平均的)ice covers about fifteen million square kilometers in March. That is seven hundred thirty square kilometers smaller than that three years ago.Scientists say ninety percent of all Arctic Ocean ice is only one or two years old. They say the newer ice is easier to melt during the summer months.The area of the ice and its thickness are very important to the health of the Arctic Ocean. Because it throws sunlight back into space and keeps the sea cold. The ice also cools the air. But when the ice melts, the sun warms ocean waters.A scientist says a warmer Arctic and thinner sea ice change the balance (平衡)between the cold Arctic and warmer areas. And it also affects (影响)Arctic wildlife and people who depend on the enviro－nment there. The melting has already brought problems to the animals like the polar bears and the earth's weather.( B )1.How is the ice in the Arctic Ocean now?A．It's thicker and thicker.B．It's getting less and thinner.C．It's brighter and smaller.D．It's polluted heavily.( D )2.According to the second paragraph, we know________．A．three years ago an average ice was even smallerB．the area of an average ice is getting larger from MarchC．scientists didn't know t he area of an average ice three years agoD．the area of an average ice is now smaller than that three years ago( B )3.How old is the most newer ice of the Arctic Ocean?A．It's one year old.B．It's one or two years old.C．It's ninety years old.D．It's fifteen million years old.( C )4.From the passage, we know________．A．ice cannot cool the airB．ice can keep the sea cleanC．ice can throw sunlight back into spaceD．ice can become thicker( C )5.The writer wants to tell us________．A．the warmer Arctic can only affect the animals thereB．A lot of Arctic wildlife can live in the Arctic OceanC．the melting of the ice in the Arctic Ocean can affect the earth's weather D．many polar bears died because the environment they depended on changedGroup 3ALong ago, three pigs grew up and left their parents' home. They said goodbye to each other and went_their_separate_ways．The youngest pig was lazy and did not like to work. The middle pig didn't mind working, but he always took the easy way out. The o ldest pig worked hard and always thought before doing things.Each little pig decided to build a house. The youngest pig thought，“I will build my house with grass. It is light and easy to build with.”The middle pig thought，“Here are many small sticks. They are easy to work with. I will build my house out of sticks.”The oldest pig thought，“There are many dangers in the world. I must build a strong house using stones.”And soon, the three pigs built their houses. One day, a big bad wolf(狼) came to town. He was very hungry. He saw the first little pig in his grass house. He pushed down the house and ate the little pig. Then the wolf came to the stick house and pushed it down, too. The wolf ate the second pig. When the wolf came to the stone house, he pushed again and again. However, he couldn't push it down. Finally, the wolf gave up and went away. The oldest pig lived a long and happy life.( C )1.What does the underline phrase“went their separate ways” mean in Chinese? A．各取所需 B．各司其职C．各奔东西 D．各不相让( B )2.The youngest pig used________to make his house.A．sticks B．grassC．stones D．glass( D )3.The wolf gave up at last because ________．A．he wasn't hungryB．the oldest pig wasn't at homeC．he was afraid of the oldest pigD．the stone house was too strong( A )4.Which of the following is the right order(顺序) of the story?①The oldest pig built his house.②The three pigs left their parents' home.③The wolf pushed the two pigs' houses down.A．②①③ B．①②③C．③①② D．②③①( D )5.From the story we can learn that we should________．A．learn to work with othersB．always take the easy way outC．learn to take others' adviceD．think carefully before doing thingsBOne day a rich boy boug ht a magic mirror. When he got home, he looked into the mirror. His face looked sad. He tried to smile and make funny faces, but his face still looked sad. Then he did many funny things, but his face always looked sad.“Oh, what a terrible mirror! It doesn't work！”he said angrily.The next day on his way to buy some choco late, he saw a little girl crying sadly. The rich boy went up to her and asked what had happened. The little girl said she couldn't find her parents.“Don't worry. I'll help you，”the rich boy said. So theywent to look for them together. Finally they found her parents. They were so thankful for his help. After the rich boy arrived home, he looked in the mirror as usual. To his surprise, his face looked very happy. The boy understood the magic of the mirror. The mirror could show the true feelings of its owner. This was true－the rich boy had helped that little girl so he felt really happy.( B )1.How did the boy's face look in the mirror on the first day? A．Happy. B．Sad.C．Angry. D．Funny.( C )2.What did the boy do on his way to buy chocolate?A．He lost his parents.B．He bought a new mirror.C．He helped the little girl find her parents.D．He bought a mirror for the little girl.( D )3.What was special about the mirror?A．It never looked happy.B．It was terrible.C．It could help the owner find the way.D．It could show its owner's true feelings.( D )4.What is the rich boy like?A．He is outgoing.B．He is foolish.C．He is clever.D．He is ready to help.( A )5.What is the best title for the passage?A．A Magic Mirror B．A Rich BoyC．A Terrible Mirror D．A Helpful GirlGroup 4AAre you a shy person？Do you expect to become outgoing？Being outgoing can help a lot in your life. In fact，being outgoing is not so hard as you think. Here is some advice on how to become outgoing.You can start to try becoming outgoing when you stay with your friends. But the real challenge (挑战) comes when you meet strangers or new friends. Smile at them，and usually they will smile at you，too. You may find it easy to start talking in this way.Start a talk positively (积极地)．Try to speak first. Simple greetings such as “Hello！”“How is it going？”and“It's a little cloudy today，isn't it？”are a good start. After that，you can talk more. For exam ple，you can talk about the latest news. But you'd better read some news in newspapers and have your own ideas first. Or you may find that you won't have much to say.The best way to become outgoing is to go out. It is also a very important step. Usually those who like to do the same things can get to know each other better. If you like playing sports，go to a sports club. You may make many new friends there if you get over your shyness.( B )1.The passage gives us ________pieces of advice on how to become outgoing. A．two B．threeC．four D．five( C )2.The writer advises that a shy person can start with ________if he or she wants to try becoming outgoing.A．classmates B．parentsC．friends D．teachers( D )3.According to the writer，________is the best way to become outgoing. A．starting a small talkB．smilingC．playing sportsD．going out( A )4.What is the Chinese meaning of the underlined word“latest”in the passage? A．newest B．heaviestC．worst D．strongest( B )5.Which of the following is NOT true?A．If you want to become outgoing，you'd better start a talk first.B．A shy person won't become outgoing.C．Being outgoing isn't so hard as you think.D．Going out is a very important step to become outgoing.BWhat kind of vehicle (交通工具) will you choose when traveling between provinces? Many may say trains. Now, the high－speed railways (高速铁路) have connected(连接) Eastern and Western China as well as the South and the North.A new high－speed railway opened on September 10th, 2016. It connects Zhengzhou in Henan Province to Xuzhou in Jiangsu Province. With this railway, China's high－speed railways are over 20，000 km long. It is the world's longest and makes up 60 percent of the world's total high－speed railway lines.However, China wasn't an early starter in the high－speed railways. Japan started half a century (世纪) ago, while Germany did 20 years ago. China only began to build its high－speed railways 14 years ago.Behind the fast development (发展) of China's high－speed railways, there is the country's growing need for transportation. According to Xinhua, China's high－speed trains gave 961 million trips to people last year. The number was three times as large as that in 2010.“The high－speed railways are not only the bridge to different places, but also connect people, information and goods(商品). It greatly improves the economy (经济) in different areas, people's lives and tourism，”said Huang Xin, an official from the China Railway Corp.China's building of high－speed railways is still going on. The National Development and Reform Commission said in July that China plans to have 38，000 km of high －speed railways by 2025.( C )1.What makes the high－speed railway from Zhengzhou to Xuzhou special? A．It was the first high－speed railway in China.B．It connects Eastern and Western China as well as the South and the North. C．It makes China's high－speed railways over 20，000 km long.D．It makes up 50 percent of the world's total high speed railway lines.( D )2.In which order (顺序)were these countries starting to build high－speed railways?A．China Germany JapanB．Japan Germany ChinaC．China Japan GermanyD．Germany Japan China( A )3.How many trips did China's high－speed trains give to people in 2010? A．About 320 million.B．About 961 million.C．About 2，883 million.D．About 290 million.( C )4.What does Huang Xin mean according to the second last paragraph(倒数第二段)?A．China is a very poor country.B．China should build more bridges.C．The high－speed railways have improved people's life a lot.D．The high－speed railways in China are not long enough.( D )5.What is the article mainly about?A．How to build high－speed railways.B．The different vehicles of our travelling.C．High－speed railways in different countries.D．The development(发展)of China's high－speed railways.CThis is not a diet. It's a simple way to lose weight. And you don't even have to give up the food you love or join a gym. You just follow some habits that thin people have. Keep them, and you'll become thin.(1)Wake－upWhen you wake up in the morning, sit up slowly without using your hands. With legs straight out, bend(弯曲)forward until you feel sore in your back. It will burn about 10 calories(热量单位：卡路里)．(2)Start with soupWhen you have a meal, order a clear soup, and have it before having the main food. In this way, you'll feel fuller, so you'll eat less when the main food comes. (3)An apple (or more)a dayApples are full of fiber(纤维) and water, so your stomach will want less. The study shows that people who eat at least three apples a day lose weight.(4)Stand up and walk aroundEvery time you use the mob ile phone, stand up and walk around. Heavy people sit on average(平均)two and a half hours more each day than thin people. This skill is very imp ortant as standing up and walking around will burn 50 or more calories. Use these skills, and you will have a big weight loss.( A )1.What should we have first if we want to eat less main food?A．Soup. B．Ice cream.C．Salad. D．Cheese.( B )2.Why does eating apples make one's stomach want less food?A．Because apples are delicious.B．Because apples are full of fiber and water.C．Because apples are sour.D．Because only apples are filled with calories.( C )3.Which of the following may the writer disagree?A．Sitting up without using your hands helps burn calories.B．Eating apples every day is good for people's health.C．You have to join a gym if you want to lose weight.D．It's good to walk around while talking on the mobile phone.( A )4.What's the purpose (目的)of the passage?A．To give some advice on how to lose weight.B．To advise people to eat apples every day.C．To tell people how to enjoy a better life.D．To advise people to give up bad habits.( D )5.In which part of a newspaper would you most probably read the passage? A．Shopping. B．Teaching.C．Family. D．Health.。
【高考推荐】2020-2021高考数学二轮复习小题专项练习(四)三角恒等变换与正余弦定理文
小题专项练习(四) 三角恒等变换与正余弦定理C.13D.238．[2018·安徽马鞍山高三第三次模拟]已知sin α－2cos α＝3，则tan α＝( )A ．±22 B ．± 2C ．－ 2D ．－229．[2018·山东烟台适应性练习]在△ABC 中，内角A ，B ，C 所对的边分别为a ，b ，c ，若b sin2A ＋3a sin B ＝0，b ＝3c ，则c a的值为( )A ．1 B.33C.55 D.7710．已知△ABC 的内角A ，B ，C 所对的边分别为a ，b ，c ，B ＝π4，tan ⎝ ⎛⎭⎪⎫π4－A ＝12，且△ABC的面积为25，则a ＋b 的值为( )A ．5＋5 5B ．5C ．10 5D ．5＋10 511．[2018·衡水联考]△ABC 的内角A ，B ，C 所对的边分别为a ，b ，c ，已知ab sin C ＝20sin B ，a 2＋c 2＝41，且8cos B ＝1，则b ＝( )A ．6B ．4 2C ．3 5D ．712．如图，在海岸线上相距26千米的A ，C 两地分别测得小岛B 在A 的北偏西α方向，在C的北偏西π2－α方向，且cos α＝63，则BC 之间的距离是( )A ．303千米B ．30千米C ．123千米D ．12千米二、填空题：本大题共4小题，每小题5分，共20分，把答案填在题中的横线上．13．[2018·河南洛阳第三次统考]已知角α的始边与x 轴的非负半轴重合，顶点与坐标原点重合，终边过点P (3,4)，则sin α＋2cos αsin α－cos α＝________.14．[2018·江苏南师附中四校联考]已知tan π4＋θ＝3，则sin θcos θ－3cos 2θ的值为________．15．[2018·广西钦州第三次质量检测]△ABC 的三内角A ，B ，C 的对边边长分别为a ，b ，c ，若a ＝52b ，A ＝2B ，则cos B ＝________.16．[2018·高考押题预测卷]如图，在△DEF 中，M 在线段DF 上，EM ＝DE ＝3，DM ＝2，cos ∠F ＝35，则△MEF 的面积为________．∴(sin α－cos α)2＝1－2sin αcos α＝169，又α∈⎝ ⎛⎭⎪⎫π2，π，sin α－cos α>0， ∴sin α－cos α＝43，故选C.6．B 由sin(C －A )＝12sin B ，得2sin(C －A )＝sin(C ＋A )，∴2sin C cos A －2cos C sin A ＝sin C cos A ＋cos C sin A ， ∴sin C cos A ＝3cos C sin A ，由正余弦定理，得 c ·b 2＋c 2－a 22bc ＝3a ·a 2＋b 2－c 22ab ，得4c 2－4a 2＝2b 2＝2×16＝32， ∴c 2－a 2＝8，故选B.7．B 由2cos2θcos ⎝ ⎛⎭⎪⎫π4＋θ＝3sin2θ，得2cos 2θ－sin 2θ22cos θ－sin θ＝23sin θcos θ，即2(cos θ＋sin θ)＝23sin θcos θ，∴1＋2sin θcos θ＝3sin 2θcos 2θ，∴sin θcos θ＝－13，或sin θcos θ＝1(舍)，∴sin2θ＝－23，故选B.8．D 由sin α－2cos α＝3，得sin 2α－22sin αcos α＋2cos 2α＝3sin 2α＋3cos 2α，∴2sin 2α＋22sin αcos α＋cos 2α＝0，∴2tan 2α＋22tan α＋1＝0，∴(2tan α＋1)2＝0，∴tan α＝－22，故选D.9．D 由b sin2A ＋3a sin B ＝0， 得2b sin A cos A ＋3a sin B ＝0，∴2sin B sin A cos A ＋3sin A sin B ＝0， ∴sin B sin A (2cos A ＋3)＝0，在△ABC 中，sin B ≠0，sin A ≠0，∴2cos A ＋3＝0，∴cos A ＝－32，由余弦定理，得a 2＝b 2＋c 2－2bc cos A ＝3c 2＋c 2＋23c 2·32＝7c 2，∴c a ＝77，故选D.。
2024年语文专项练习提分卷 语言运用——标点符号
专项提分卷语言运用——标点符号1．语言运用——下列句子标点符号使用正确的一项是( )(3分)A．当生活不尽如人意，向往旅行是自然而然的事情，因为旅行半似现实，半似梦幻，当生活春风得意，旅行仍然让人期待，因为旅行像是微甜的痛感，最深切地确认着你的存在。
B．这位老“巴尔干”同意本报记者的看法：即协议虽签，维和部队开始“维和”，但科索沃的危机并没有消除。
C．“生存，还是毁灭？”莎士比亚的这句名言揭示出一个最基本的哲学命题，那就是人的生存价值是什么？D．杭州之美就是由漂流书亭、暖心姜茶、上门摄影以及遍及大街小巷的各种志愿服务等细节之美构成的，从盆景变风景，又从风景孕育、绽放出最美的城市之花。
2．语言运用——下列句子标点符号使用正确的一项是( )(3分)A．教师教导我们说：“在学习中，一定要有“知之为知之，不知为不知”的思想，不能不懂装懂。
”B．2014年诺贝尔文学奖获得者是法国作家帕特里克·莫迪亚诺，其代表作有“暗店街”“八月的星期天”等。
C．当我登上泰山的那一刻，我想到了唐代诗人杜甫的诗句：“会当凌绝顶，一览众山小。
”D．《海的女儿》中“美人鱼”的行为让我们见证了什么才是真正的、纯洁的、美丽的爱情。
3．语言运用——下列句子标点符号使用正确的一项是( )(3分)A．这种埋头做事不动脑筋的人简直是——说得不客气一点——跟牛马一样。
B．小河对岸三、四里外是浅山，好似细浪微波，线条柔和，蜿蜒起伏，连接着高高的远山。
C．“这究竟是怎么回事呢？同志们。
”厂长严肃地说。
D．哪一种办法省时间，我们能一眼看出第一种办法好，后两种办法都“窝了工”。
4．语言运用——下列句子标点符号使用正确的一项是( )(3分)A．海内外市场需求正呈现好转迹象，我市今年二三季度工业景气状态将有所好转。
B．我家门前的山沟，长满了各种各样的树木，里面还有小松鼠、小兔子、小蚱蜢等……C．而且，我想告诉人们，它味苦，微涩，但能救人。
D．千垛菜花旅游节开幕式上，兴化籍三位作家：毕飞宇、庞余亮、顾坚在一起畅谈写作体会。