2019届秋季上学期高二语文8月月考试题(含解析) (631)
2019届秋季上学期高二语文8月月考试题(含解析) (764)
8.介词on, in, under
【参考答案】
【词汇拓展】
1.well; better; best2.spelt3.pleased; pleasure 4.colorful5.saw; seen6.said
7.met; meeting 8.friendly; friendship9.Chinese10.families 11.dictionaries12.thanks; thankful13.teacher 14.helpful; helpless15.found16.lost
2.picture (n.)描述,描绘,描写The book gives you a goodpictureof what life was like in the early 19th century.这本书生动地描绘了19世纪初期人们的生活。(v.)想象,设想David hadpicturedher as serious, but she wasn't like that.戴维原本想象她是个严肃的人,但其实她不是。
2.What color is it
3.What's your telephone number
4.Who's she
5.Is this your pencil
6.What about this dictionary
7.Where is my pencil box
8.Are the keys on the sofa
10.family(n.)→(pl.)家;家庭
11.dictionary(n.)→(pl.)词典;字典
12.thank(v.)→(n.)感谢;谢谢→(adj.)感谢的;感激的
2019届秋季上学期高二语文8月月考试题(含解析) (1138)
9大语法难点(1)一、宾语从句1.宾语从句的含义充当主句宾语的从句叫做宾语从句。
如:She knew that the teacher had se en the film.她知道这位老师看过这部电影。
“that the teacher had seen the film”做 knew 的宾语,同时又是由连接词 that 引导的从句,所以它叫做宾语从句。
2. 宾语从句的分类(1)动词宾语从句:顾名思义,它是位于动词后面的宾语从句。
如:He asked whose handwriting was the best in our class.他问我们班上谁的书法最好。
(2)介词宾语从句:顾名思义,它是位于介词后面的宾语从句。
如:I agree with what you said just now.我同意你刚才说的话。
(3)形容词宾语从句:顾名思义,它是位于形容词后面的宾语从句。
如:I am afraid that I will be late. 恐怕我要迟到了。
3. 引导宾语从句的连接词(1)that:没有含义,在宾语从句中不做成分(2)whether/if:表示是否,在宾语从句中不做成分。
I don't know if /whether he still lives h ere after so many years. 我不知道这么多年后,他是否还住在这里。
(3)连接代词:what, which, who, whom, whose(在宾语从句中做主、宾、表和定语)连接副词:where, when, how, why(在宾语从句中做状语)The small children don't know what is in their stockings.(what 在宾语从句中做主语)这些小孩子不知道什么在他们的长筒袜里。
Could you tell me why you were late for the meeting this morning?(why 在宾语从句中做原因状语)你能告诉我为什么你今天早上开会迟到吗?4. 在做宾语从句的题目时应注意两点(1)时态:①当主句是现在时态时,宾语从句可以根据需要使用任何时态。
2019届秋季上学期高二语文8月月考试题(含解析) (632)
全等三角形课后作业题十三1.如图,AC是△ABC和△ADC的公共边,下列条件中不能判定△ABC≌△ADC的是()A.AB=AD,∠2=∠1B.AB=AD,∠3=∠4C.∠2=∠1,∠3=∠4D.∠2=∠1,∠B=∠D2.如图,AE⊥AB且AE=AB,BC⊥CD且BC=CD,请按照图中所标注的数据,计算图中实线所围成的图形的面积S是()A. 50B. 62C. 65D. 683.如图,在Rt△ABC中,∠ACB=90°,AC=BC,CD⊥AB于D点,M,N是AC,BC上的动点,且∠MDN=90°,下列结论:①AM=CN;②四边形MDNC的面积为定值;③AM2+BN2=MN2;④MN平分∠CND.其中正确的是()A.①②③ B.①②④ C.①③④ D.①②③④4.已知△ABC≌△DEF,∠A=80°,∠E=50°,则∠F的度数为()A.30° B.50° C.80° D.100°5.如图,已知△ABC,按如下步骤作图:(1)以A圆心,AB长为半径画弧;(2)以C为圆心,CB长为半径画弧,两弧相交于点D;(3)连接BD,与AC交于点E,连接AD,CD.①四边形ABCD是中心对称图形;②△ABC≌△ADC;③AC⊥BD且BE=DE;④BD平分∠ABC.其中正确的是()A.①② B.②③ C.①③ D.③④6.如图,已知AB=AC,AD=AE,若要得到“△ABD≌△ACE”,必须添加一个条件,则下列所添条件不恰当的是()A.BD=CE B.∠ABD=∠ACE C.∠BAD=∠CAE D.∠BAC=∠DAE7.(2015秋•常州期末)如图,下列条件中,不能证明△ABC≌△DCB的是()A.AB=CD,AC=BDB.AB=CD,∠ABC=∠BCDC.∠ABC=∠DCB,∠A=∠DD.AB=CD,∠A=∠D8.如图,由∠1=∠2,BC=DC、AC=EC,最后推出△ABC≌△EDC的根据是()A. SAS B.ASA C.AAS D.SSS9.(2015春•南京校级期末)下列说法中:①如果两个三角形可以依据“AAS”来判定全等,那么一定也可以依据“ASA”来判定它们全等;②如果两个三角形都和第三个三角形不全等,那么这两个三角形也一定不全等;③要判断两个三角形全等,给出的条件中至少要有一对边对应相等.正确的是()A.①和② B.②和③ C.①和③ D.①②③10.如图,△ABC≌△BDE,点B、C、D在一条直线上,AC、BE交于点O,若∠AOE=95°,则∠BDE= °.11.已知:如图,△ABC≌△DFE,若∠A=60°,∠E=90°,DE=6cm,则AB= cm.12.如图,△OAD≌△OBC,且∠O=60°,∠C=20°,则∠OAD= °.13.如图,BD是∠ABC的角平分线,DE⊥AB于E,△ABC的面积是30cm2,AB=8cm,BC=7cm,则DE= cm.14.如图,AC⊥BC于C ,DE⊥AC于E ,A D⊥AB于A , BC=AE.若AB=5 ,则AD=___________.15.AD是△ABC的边BC上的中线,AB=12,AC=8,则边BC的取值范围是;中线AD的取值范围是.16.如图,已知AC=BD,∠A=∠D,请你添一个直接条件,,使△AFC≌△DEB.(写出一种答案即可)17.如图,在Rt△ABC中,∠C=90°,AM、BN分别平分∠CAB、∠ABC,AM与BN相交于点O,OD⊥AB,AB=10,AC=8,BC=6,则OD=____________.18.已知图中的两个三角形全等,则∠1等于度.19.如图,△ABC中,∠C为直角,射线AD平分∠BAC交BC于点D,BD∶DC=2∶1,BC=3.6cm,则点D到AB 边的距离为 cm。
2019届秋季上学期高二语文8月月考试题(含解析) (800)
词语运用
74
year→years
I've been buying the lottery (彩票) for almost twentyyears...
2010
词语运用
72
lesson
...you have learned a valuable(有价值的)lessontoday.
词语运用
73
time→times
词语运用
75
way
In the Republic of Korea,the"hand heart"has been popular for a long time,but in a differentway.
2014
词语运用
68
rest
After the students get paid, therestof the money goes to a local youth project.
词语运用
75
people
However, I knew that as soon as I got my smartphone back I would be one of thosepeopleonce again.
2015
词语运用
67
star→stars
Many young popstarsin theUShave done the move in recent photos.
词语运用
74
soup
Nasreddin's wife brought somesoupto the table and the visitor tasted it.
2019届秋季上学期高二语文8月月考试题(含解析) (1066)
Unit 1 Where did you go on vacation? Section AI.用所给词的适当形式填空(每小题1分)1.I think you are old enough (足够)to dress (you),Rick.2. If anyone (ask)me the way to somewhere, I will say, “Sorry, I am a stranger here.”3.Do you read Lei Feng’s (diary)? I learn a lot from them.4.Linyi People’s Park is a (wonder)place to have fun at.5.He doesn’t have a job. So he has nothing (do)every day.6.Her son seems (be)asleep.7.The football match was ______ (wonder)last week.8.You must look after ___ (your)because no one can help you.9.Why do you keep ___ (talk)about that?10.Something __ (be)wrong with your watch.11.—When did you go (shop)? —At 8:00 p.m. yesterday evening.12.He seemed (be)tired in class.13.I felt very nervous(紧张的) in the classroom, because I didn’t know (someone).14.The weekend was boring. She seemed to be (boring).15.Help (you)to some fish, boys and girls.16.Can you find a ______________(different) between the two pictures?17.Alice always _____________(try) to help me to learn English well.18.Are there any_______________ (bird) in the tree?19.Living in the village is boring,so she ____________(like) it.20.Students should be careful when they are taking some of the outdoor ______________(activity).Ⅱ.单项填空11.—The weather was really cold yesterday. —Yes. It was five ________ zero last night.A.under B.below C.down D.betweenst Sunday we didn't go out ________ the rain.A.because of B.because C.in front of D.before13.—Why didn't you get to the top of the mountain? —Because we didn't have________ time.A.free B.right C.natural D.enough14.Mike decided ________ the museum this Sunday.A.visit B.visits C.visiting D.to visit15.Please turn on the TV.I________ what the weather will be like tomorrow.A.wonder B.feed C.know D.wait16.My host family tried to cook for me when I studied in New Zealand.A. different somethingB. different anythingC. something differentD. anything different17.You may take of these books, but you must return(归还) it on time.A. someoneB. everyone C .anyone D. any one18.I tennis with my cousin every day when I was in America.A. playB. playedC. had playedD. has played19.What a surprise to see you here! When you back?A. do, getB. did, getC. do, gotD. will, get20.The only problem was that there was to do but read.A. much somethingB. anything muchC. much nothingD. nothing much21.We some hens and some baby pigs last vacation.A. feed, seeB. fed, seeC. feed, saw D .fed, saw22.—Let’s buy some cards our teachers on Teachers’ Day.—Why not make some by hand? It’s much more interesting.A. forB.toC.atD. with23.—How was your trip? —.I hope I can go there again.A. Just so-soB. Not very goodC. Nothing specialD. Wonderful24.—Did you buy anything during the vacation? —.I bought a pair of new shoes anda T-shirt.A. Sounds goodB. Of courseC. Not reallyD. Oh, no25.Yesterday,I forgot an umbrella with me,so I was all wet.A. bringB. bringingC.to bringD. brought26.—Is here? —No. Kate is ill in hospital.A. someoneB. anyoneC. everyoneD.no one27.In our school students like English, but of them can speak English smoothly(流畅地).A. a little, a fewB. a few, few C .a few, little D .a little, few28.I think it’s important to there on time. A .go B. going C.t o goD. goes29.When summ er comes, a lot of people feel like in the pool.A.to swimB. swimC. swimmingD. have swum30.The new kind of ring is expensive. I don’t have money.A. too much, much tooB. much too, too much C .too many, too much D. much too, much too31.Two Chinese pandas, Tiantian and Yangguang, England the afternoon of December 4th,2011.A. arrived in, onB. arrived at, inC. arrive in, onD. got to, in32.The pizza good. I’d like some more. A. turns B. sounds C. feels D. tastes33.He didn’t go to school yesterday he was ill. A. because B .because ofC. ifD.so34.When you move somewhere new, the first thing for you is to find a place .A.to liveB. living inC.to live inD. live35.—What do you think of the lecture of Li Yang’s Crazy English?—I think it’s ,but someone t hinks it’s much too . A. wonderful enough, bored B. enough wonderful, boring C. enough wonderful, bored D. wonderful enough, boring36.She is new here,so she has_____ friends at school. A.much B.few C.little D.a litt le37.—Can you help me work out the problem?It's so difficult.—OK. Let me ________.A.grow B.try C.pick D.blow38.I don't want to go to the museum,because it's too________.A.relaxing B.boring C.bored D.beautifulⅥ.完形填空(每小题1分,共10分)Mr.and Mrs.Smith always spent their summer holidays in a small hotel at the seaside near their hometown. One year, however, Mr.Smith made a lot of 36 in his business, so they decided 37 to a foreign country and stay at a really good 38 .They flew to London and 39 at a 5-star hotel late in the evening. Although they were hungry, they thought they would have to go to bed, because in that 40 hotel where they had been used to (过去常常)stay in the past, no meals were served(供应) 41 seven in the evening. They 42 surprised to be told that the hotel served dinner until ten. “Then what is the time 43 meals?” asked Mrs.Smith.“Well, madam, we serve breakfast from seven to eleven, lunch from twelve to three, 44 from four to five, and dinner from six to ten.”“But that hardly leaves any time for us to see the city!” said Mrs.Smith.When the waitress 45 this, she smiled and said, “You can choose (选择)any time to come here for a meal.”36.A.mistakes B. time C. friends D. money 37.A.went B.to go C. go D. going38.A.hotel B. place C. city D. restaurant 39.A.stayed B. got C. arrived D. reached40.A.small B. big C. foreign D. good 41.A.on B. after C. during D.until42.A.are B.is C. were D.be 43.A.with B. on C.at D. of 44.A.drink B. tea C .beer D. food 45.A.hear B .heard C. listen D. heardⅦ.阅读理解(每小题2分,共30分)AQingdao is famous for its sunshine, white sandy beaches and clear water. You can relax here, walking along the beaches and breathing the fresh air! On July 18th,2014,Frank and his parents went to Qingdao.T hey were on vacation. Qingdao is a beautiful city beside the sea. It was about 12:00 when they arrived there on the first day. They found a hotel and had a short rest. It was really hot and they decided to go to the beach. At about 3:30 pm, th eygot to the beach. There were many people there. Some were lying on the beach and many children were playing in the water. Frank was playing with them and he was very happy. His parents also felt relaxed. About two hours later, they went back to the hotel.On the second day, it rained all day. Frank played computer games in the hotel with his father and his mother went shopping. On July 20th,they went to Laoshan Mountain in the morning and took a bus home in the afternoon. They were tired but very happy.46.Where did Frank’s family go on vacation?A. To Shanghai.B. To Tianjin.C. To Qingdao.D. To Shanxi.47.What did Frank’s fa ther do on July 19th? A. He swam in the sea. B. He played computer games in the hotel. C. He went shopping with Frank’s mother.D. He visited Laoshan Mountain.48.How long was their vacation? A. One day. B. Two days. C. Three days. D. Four days.49.How did they go back home? A. By train. B. By bus. C. By bike. D. By taxi.50.Which of the following is TRUE?A. They stayed on the beach for about an hour.B. They went shopping on July 20th.C. Frank didn’t play in the water on the first day.D. It rained on July 19th.BThe summer vacation is over. It’s tru e that time flies. During the vacation, the weather was hot and I could not do much work, but I was happy.As the afternoons were hot, I did my work in the morning. I got up at 6:30 and took a walk in the garden for half an hour. After breakfast, I did some exercises in math. I spent three hours or more doing this. I worked quite hard and made good progress(取得进步).In the afternoon I went swimming. It was fun. I did not go home until about five or six o’clock. Sometimes in the evening a friend of mine would come to see me and we would spend some time listening to music.In this way I spent my vacation happily. I not only studied well but also became a good swimmer. Now I am in good health and high spirits(精神).51.What does the text mainly tell us?A. How the writer spent his summer vacation.B. What the weather was like that summer.C. When the writer got up in the morning.D. Where the writer took a walk.52.How long did the writer spend doing his exercises?A. Half an hour.B. Three hours or more.C. Only one hour.D. Two hours and a half.53.The writer spent most of the afternoons .A. listening to musicB. visiting his friendsC. walking in the garden D .swimming54.The writer had a very good summer vacation because he .A. worked very hard and made good progressB. went to swim and made good progress in mathC. got up early and went home lateD. liked swimming better than studying55.Which of the following is NOT true?A. The writer made progress in math.B. The writer took a walk for half an hour before breakfast.C. The writer began studying as soon as she got up.D. The writer spent more time swimming than listening to music.Ⅴ.词语运用。
2019届秋季上学期高二语文8月月考试题(含解析) (502)
河南省滑县2019届高三数学第二次联考试题文(扫描版)2018—2019学年高三年级调研考试(二)数学(文科)参考答案1.【答案】B【解析】依题意,{}{}232,1,0,1,2Z A x x =∈-≤<=--,故{}0,2A B =,故选B.2.【答案】A 【解析】依题意,()()()()24i 13i 24i 26i 4i 121010i1i 13i 13i 13i 1010--------====--++-,故选A. 3.【答案】D【解析】依题意,131********n n ⎡⎤⎛⎫-⎢⎥⎪⎝⎭-⎢⎥⎣⎦=--,化简可得2log 6n =,故[]2n =,则第2日蒲生长的长度为D. 4.【答案】C【解析】运行该程序,第一次,999,2S k ==;第二次,995,4S k ==;第三次,979,6S k ==;第四次,915,8S k ==;第五次,659,10S k ==,第六次365,12S k =-=,此时0S <,故输出的k 的值为12,故选C. 5.【答案】B【解析】A 班学生的分数多集中在[70,80]之间,B 班学生的分数集中在[50,70]之间,故A B x x >;相对两个班级的成绩分布来说,A 班学生的分数更加集中,B 班学生的分数更加离散,故22A B s s <,故选B.6.【答案】A【解析】依题意,()()()()55255550550mn m n m n n m n ->-⇔--->⇔-->5,5,5,5,m m n n ><⎧⎧⇔⎨⎨><⎩⎩或故“2216m n +<”⇒“5525mn m n ->-”,反之不成立,例如6m n ==;故“2216m n +<”是“5525mn m n ->-”的充分不必要条件,故选A. 7.【答案】C【解析】作出该几何体1111ABCD A B C D -的直观图,旋转一定的角度后,得到的图形如下图所示,观察可知,1CA =1A D =,1A B = C.8.【答案】B【解析】依题意,不妨设点M (x,y )在第一象限,联立225,,x y by x a ⎧+=⎪⎨=⎪⎩解得,x c y ⎧=⎪⎪⎨⎪=⎪⎩(其中222b a c +=),可知四边形MNPQ为矩形,且根据双曲线的对称性,2c c ⋅=,即225c ab =,解得12b a =(2b a=舍去),故所求渐近线方程为12y x =±,故选B. 9.【答案】D【解析】依题意,函数()f x 为偶函数,故1k =-,则()()320g k x g x ++-+=即为()()132g x g x -++-=-,故函数()g x 的图象的对称中心为()1,1-,故选D.10.【答案】A【解析】依题意,()()()3sin 32sin 33f x x x x πϕϕϕ⎛⎫=-+-=-+ ⎪⎝⎭,则()333Z k k ππϕπ⨯-+=∈,则()43Z k k πϕπ=-∈;因为2πϕ<,故3πϕ=,故()2sin 3f x x =,则将函数()f x 的图象向右平移6π个单位长度 后得到函数()2cos3g x x =-的图象,故选A. 11.【答案】B【解析】依题意,当0x ≥时,()()2'1212121f x x x x x =-=-,故当()0,1x ∈时,()'0f x <,当()1,x ∈+∞时,()'0f x >,且()11f =-,作出函数()f x 的大致图象如下所示;令()()()22320g x f x f x =--=⎡⎤⎣⎦,解得()()122f x f x ==-或,观察可知,函数()g x 共有3个零点,故选B.12.【答案】A【解析】设()00,M x y ,()11,N x y ,则直线MA 1的斜率为1003MA y k x -=,由11NA MA ⊥,所以直线NA 1的斜率为1003NA x k y =--.于是直线NA 1的方程为:0033x y x y =-+-.同理,NA 2的方程为:0033x y x y =--+.联立两直线方程,消去y ,得20109y x x -=. 因为()00,M x y 在椭圆221189y x +=上,所以22001189x y +=,从而2292x y -=-.所以012x x =-. 所以1212012MA A NA A S x S x ∆∆==,故选A. 13.【答案】322-或【解析】依题意,()4212m m +⋅=,解得322m =-或. 14.【答案】5【解析】作出不等式组所表示的平面区域如下图阴影部分所示,观察可知,当直线2z x y =-过点55,33A ⎛⎫- ⎪⎝⎭时,2z x y =-取最大值,最大值为5.15.【答案】108【解析】依题意,不妨设2AB =,故所求概率22224P ππ⨯⨯+⨯⨯==.16.【解析】因为()sin sin 4sin sin ABC b a A b B B S bc C ∆+=⋅+,故2sin sin 4sin sin ABC ab A b B B S bc C ∆+=⋅+,即222sin sin 4sin sin ABC a B b B B S c B ∆+=⋅+,即2224ABC a b c S ∆+-=,故cos sin ab C ab C =,故4C π=,则△ABC的外接圆半径为2sin c C ==.17.【解析】(1)依题意,设BD x =,则AD =,3BC x =,又,43B AB π==.在△ABD 中,由余弦定理得3cos4216322π⋅⋅-+=x x x ,即2280x x +-=,解得2x =,或4-=x (舍去). 则36BC x ==;(5分)(2) 在△ ABC 中,设A,B,C 所对的边分别为a,b,c , 由正弦定理sin sin b c B C=,得sin sin c B C b ==又AC b AB c =>=,所以B C >,则C为锐角,所以cos 3C =则()1sin sin sin cos cos sin 2BAC B C B C B C ∠=+=++=.(10分) 18.【解析】(1)依题意,设等差数列{}n a 的公差为d ,则4224d a a =-=,解得2d =,故11a =,21n a n =-,而236m mS S +=+,则214436m m a a m +++=+=,解得8m =,故32424232425762m S S ⨯==+⨯=;(6分)(2)因为21n a n =-,故()()+1211111212322123n n a a n n n n +⎛⎫==- ⎪++++⎝⎭,故()111111111...23557792123323n nT n n n ⎛⎫=-+-+-++-= ⎪+++⎝⎭.(12分) 19.【解析】(1)依题意 ,所求平均数为20.260.36100.28140.12180.04⨯+⨯+⨯+⨯+⨯ 0.4 2.16 2.8 1.680.727.76=++++=;(3分) (2)依题意,完善表中的数据如下所示:故()222000800600200400333.3310.828100010001200800K ⨯⨯-⨯=≈>⨯⨯⨯;故有99.9%的把握认为“愿意购买该款电视机”与“市民的年龄”有关;(7分)(3)依题意,使用时间在[)0,4内的有1台,记为A ,使用时间在[]4,20内的有4台,记为a,b,c,d ,则随机抽取2台,所有的情况为(A ,a ),(A ,b ),(A ,c ),(A ,d ),(a ,b ),(a ,c ),(a ,d ),(b ,c ),(b ,d ),(c ,d ),共10种,其中满足条件的为(a ,b ),(a ,c ),(a ,d ),(b ,c ),(b ,d ),(c ,d ),共6种,故所求概率63105P==.(12分)20.【解析】(1)作出平面EFG 的图形如下所示,点G 为线段SB 上靠近B 点的三等分点;C(5分)(2)依题意, 因为0090,45SDA SAD ∠=∠=,故SD AD ==而2SA SB ==,所以222SB SD BD =+, 所以SD BD ⊥,又因为DADB D =,所以SD ABCD ⊥平面;因为SD ⊂平面SCD,所以平面SCD ABCD ⊥平面. 作'EE CD ⊥于'E ,因为平面=SCDABCD CD 平面,所以'EE ⊥平面SCD ;又因为//EF SCD 平面,所以'EE 即为F 到平面SCD 的距离.在△ABD 中,设AB 边上的高为h ,则h =,因为23ED EC BD AC ==,所以2'3EE h ==,即F 到平面SCD(12分)21.【解析】(1)依题意,直线l :28y x =+,联立22,28,x y y x ⎧=⎨=+⎩故24160x x --=,设11(,)M x y ,22(,)N x y ,则124x x +=,1216x x =-,故1220MN x =-==;(5分)(2)联立0,40,x y x y -=⎧⎨+-=⎩解得2x y ==,故()2,2A ,设直线l 的方程为:4(2)y k x -=+,11(,)M x y ,22(,)N x y , 则11112(2)222AM y k x k x x -++==--,22222(2)222AN y k x k x x -++==--, 212121212121212[(2)2][(2)2][2()4]2(4)4(2)(2)2()4AM ANk x k x k x x x x k x x k k x x x x x x +++++++++++==---++, 联立抛物线22x y =与直线4(2)y k x -=+的方程消去y 得22480x kx k ---=,可得122x x k +=,1248x x k =--,代入AM AN k k ⋅可得1AM AN k k ⋅=-.(12分)22.【解析】(1)依题意,()0,x ∈+∞,()221'222x mx f x x m x x++=++=⋅,若22m -≤≤,则210x mx ++≥,故()'0f x ≥,故函数()f x 在()0,+∞上单调递增;当22m m <->或时,令210x mx ++=,解得12xx ; 若2m >0<0<,故函数()f x 在()0,+∞上单调递增; 若2m <-,则当x ⎛∈⎝⎭时,()'0f x >,当x ∈⎝⎭时,()'0f x <,经典资料经典资料(一)当x ⎫∈+∞⎪⎝⎭时,()'0f x >; 综上所述;当2m ≥-时,函数()f x 在()0,+∞上单调递增;当2m <-时,函数()f x在⎛ ⎝⎭和⎫+∞⎪⎝⎭上单调递增,在⎝⎭上单调递减;(6分) (2)题中不等式等价于2222ln 2e 3x x mx x x ++≤+,即2e ln x x x mx -+≥, 因此2e ln x x x m x -+≥,设()2e ln x x x h x x-+=,∴ ()'10h =,当)1,0(∈x 时,()2e 1ln 10x x x x -++-<,即0)('<x h ,)(x h 单调递减; 当),1(+∞∈x 时,()2e 1ln 10x x x x -++->,即0)('>x h ,)(x h 单调递增; 因此1=x 为)(x h 的极小值点,即1)1()(+=≥e h x h ,故e 1m ≤+, 故实数m 的取值范围为(],e 1-∞+.(12分)。
2019届秋季上学期高二语文8月月考试题(含解析) (163)
13.3 全等三角形的判定(3)【学习目标】探索并掌握两个三角形全等的角边角(ASA )和角角边(AAS )的条件,在与他人合作交流等活动过程中,发展合情推理,进一步学习有条理的思考与表达. 【学习重点】探索并掌握两个三角形全等的角边角(ASA )和角角边(AAS )条件,并能灵活运用. 【学习难点】在观察、实验、分析中探究两个三角形全等的条件. 【预习自测】 知识链接已经学过的三角形全等的判定方法有哪些?【合作探究】 探究活动一课本“一起探究”的学习与认识.探究活动二如图,M 是AB 的中点,MC=MD ,∠1=∠2, 请说明△AMC ≌△BMD 的理由.归纳: 三角形全等判定依据有角边角(ASA ),推论角角边(AAS ) 【精讲答疑】 例题:如图,已知点D 是△ABC 的边AB 上一点,DF 交AC 于E ,DE=EF ,C F∥AB ,AE 与CE 是否相等?试说明理由.ACDM 121.课本练习.2.如图,AD⊥BC于D,BD=CD.△ABD和△ACD全等吗?为什么?【反馈拓展】1.如图,∠C =∠D,AC = BD. 则△AOC≌△BOD吗?为什么?AB C2.如图,已知:AB = CD ,DE ⊥AC ,BF ⊥AC ,垂足分别为E 、F ,∠B=∠D ,则AF = CE 吗?为什么?3. 如图,△ABC ≌△A ′B ′C ′,AD 、A ′D ′分别是△ABC 和△A ′B ′C ′的中线,你能得出AD=A ′D ′吗?变式一:若AD 、A ′D ′分别是△ABC 和△A ′B ′C ′的角平分线,AD=A ′D ′吗?变式二:若AD 、A ′D ′分别是△ABC 和△A ′B ′C ′的高线,AD=A ′D ′吗?B C ′D ′【总结反思】1.本节课我学会了:还有些疑惑:2.做错的题目有:原因:。
2019届秋季上学期高二语文8月月考试题(含解析) (1115)
化学部分A卷:7.C 8.D 9.D 10.A 11.B 12. C 13.BB卷:7.B 8.D 9.B 10.A 11.C 12.C 13.B26. (15分)(1)D→B→C→B (2分)(2)硬质玻璃管 (2分)(3) 5NO+3MnO4-+4H+=5NO3-+3Mn2++2H2O (2分)(4)60% (2分)(5)②淀粉溶液 (1分)加入最后一滴液体时,锥形瓶内溶液恰好从蓝色变为无色,且维持半分钟不变色(2分) ③56.6% (2分) ④BD(2分)27.(14分)(1)Bi2S3+6Fe3+=2Bi3++6Fe2++3S (2分)抑制溶液中Bi3+的水解(2分) SiO2(2分)(2)过滤、洗涤、干燥(2分)28. (14分)(1)CO2(g)+3H2(g)=== 1/2C2H4(g)+2H2O ΔH=-(b-a) kJ/mol(2分)(其它合理答案均得分)(2)负 (1分) 4OH――4e-=O2↑+2H2O或2H2O―4e-=O2↑+4H+(2分)(3)①Ir (1分) ②d和e(2分),<(2分)③状态a和c均未达到平衡,状态c温度高反应速率快,CO2的转化量大,转化率高;(2分)④62527(或23.15)(2分)35.【化学-物质结构与性质】 (15分)3d4s分) d (1分)(2)①具有孤电子对(或孤对电子) (2分)②sp 3(1分) 8N A (2分) ③CN -或C 22-或NO +(2分)(3)从锰到铼原子序数增大,核对外层电子引力增大,电子层数增多,核对外层电子引力减小,但前者占主导,所以铼中的金属键更强,熔点更高 (2分) (4)6 (1分) 234(3.74×10-8)3×N A(2分)36.【化学——选修5:有机化学基础】(15分) (1)- CH 3(2分)(2)取代反应(1分) -CHO(1分) (3)乙醛(2分)(4)O - CCH 2CHHOCHCH 222C -OO+ 2H 2O(2分)(5)10 (2分)CHC H 2CHO OH或或HOCH 2CHCHOOHCHCHOHOCH 2 (2分)HCHOH 2Cu/O 2ΔΔ3CH 2OHCH 3CH 3CH 2ClNaOH/H 2 OCH 2-CH 2-CH 2OHOHHOCH 2CH 2 CHO(3分)(6)。
2019届秋季上学期高二语文8月月考试题(含解析) (600)
河南省封丘县一中2018-2019学年高一数学上学期期中试题第I 卷(选择题)一、选择题(本题共12道小题,每小题5分,共60分)1.设全集为R,函数()1x f x +=的定义域为M,则R C M = ( )A.{}2x x ≥ B.{}21x x x <≠-且 C.{}21x x x ≥=-或 D.{}21x x x >=-或 2.设全集U =R ,集合A ={x |21-+x x ≤0},B ={x |1<2x<8},则(∁R A )∩B =( ) A .[2,3) B .(0,2] C .(1,2] D .[1,3]3.定义在R 上的偶函数()f x 满足:对任意的1212(,0]()x x x x ∈-∞≠、,有2121()()0f x f x x x -<-,且(2)0f =,则不等式2()()05f x f x x+-<的解集是( )A .(-∞,-2)∪(2,+∞) B.(-∞,-2)∪(0,2) C. (-2,0)∪(2,+∞) D. (-2,0)∪(0,2)4.如图,设全集U=R ,{|1}M x x x =∈R ,≤,{|02}N x x x =或≤≥,则图中阴影部分表示的集合为( )A .{|12}x x ≤≤B .{|12}x x <≤C.{|12}x x <≤ D .{|12}x x <<5.函数2()ln(1)f x x =+的图象大致是( )A. B .C. D .6.设25a bm ==,且112a b +=,则m =( )A..107.若函数()y f x =是函数xy a =(0a >且1a ≠)的反函数(2)1f =,且,则(8)f =( )A .3B .13 C.-3 D .13-8.若函数()y f x =为偶函数,且在(-∞,0)上单调递减,()20f =,则()30f x ->的解集为( ){|22}x x -<<{|15}x x << 9.幂函数f(x)=(m 2-m -1)3m m2x -+在(0,+∞)时是减函数,则实数m 的值为( )A .2或﹣1B .﹣1C .2D .﹣2或110.已知2))(()(---=b x a x x f ,并且βα,是方程0)(=x f 的两根,实数βα,,,b a 的大小关系可能是( )A .βα<<<b a B .b a <<<βαC. βα<<<b a D .b a <<<βα11.已知定义在R 上的奇函数)(x f 的图像关于直线1=x 对称,且1)1(=-f ,则)2017()3()2()1(f f f f ++++ 的值为( ) A .-1 B .0 C. 1 D .212.函数2230()lg 10x x x f x x x ⎧+-=⎨->⎩,,≤的所有零点之和为( )A .7 B .5 C.4 D .3第II 卷(非选择题)二、填空题(本题共4道小题,每小题5分,共20分)13.已知函数3()ln(3bf x ax c x x=+-+-,(3)7f -=,则f (3)的值为 . 14.函数212log (6)y x x =+-的单调递增区间为 . 15.函数213(),(2)()24log ,(02)x x f x x x ⎧+≥⎪=⎨⎪<<⎩,若方程()0f x k -=仅有一根,则实数k 的取值范围是 . 16.已知f 是有序数对集合{}**,|),(N y N x y x M ∈∈=上的一个映射,正整数对()x,y 在映射f 下的象为实数z ,记作z y x f =),(,对于任意的正整数)(,n m n m >映射f 由下表组出:使不等式4),2(≤x f x成立的x 的集合是 。
2019届秋季上学期高二语文8月月考试题(含解析) (1133)
完形填空3Doctor MomThis will be my first trip by myself.I'm going to take part in an educa tional exchange programme in the USA.I've(16)▁▁been abroad before.My mom and dad are going to drive me to the(17)▁▁."Billy,it's time to go,"says my mom."Your flight is at 3:00p.m.,and you have to be there two hours earlier.It's already(18)▁▁now,so we have to leave.""I can't leave now.I'm (19)▁▁.I have a stomachache."I tell my mom."Nothing serious,"Mom says."Take this."And she gives me a spoonful of (20)▁▁.Soon my stomach feels better."Let's go."I say.When we arrive,I stand in a long line to (21)▁▁.The woman behind the desk says,"Next passenger."I step up to the desk and give her my passport."This is the first time I' m going to fly by myself,"I tell her,"I'm a lit tle(22)▁▁."I check my bag and walk away."I don't feel well,"I tell Mom.She touches my forehead (23)▁▁."You don't have a fever.""No,"I say."I have a headache.""Don't worry,"says Mom,and she gives me an aspirin (阿司匹林)for my headache.Soon my head feelsbetter."I'm sure I'm ready now,"I tell Mom and Dad(24)▁▁.We all walk to the gate.Before I walk onto the plane,I turn back and (25)▁▁,"Thank you,Doctor Mom,"I say."Now I'm ready to fly.Goodbye!"解析:文章大意:这是一篇应用文.主要介绍作者将参加美国的教育交流计划.这是他第一次独自旅行,因此他感觉很不适,医生妈妈给他准备了各种各样的药物来应对各种不适,并用心鼓励他.这让作者彻底准备好了这次旅行.16.答案:A.考查副词.A从未.B很少.C经常.D总是.句意"我以前__出过国.".根据第一句This will be my first trip by myself这将是我第一次独自旅行.可知,应该是"从未",选A.17.答案:D.考查名词.A公交车站.B火车站.C地铁.D机场.句意"我爸爸妈妈要开车送我去___".根据下一行Your flight is at 3:00p.m你的航班在下午3点.可知,应该是"机场".选D.18.答案:B.考查名词.A早上.B中午.C晚上.D午夜.句意"现在已经是___了,所以我们得走了.".根据上一句Your flight is at 3:00p.m.,and you have to be there two hours earlier 您的航班是下午3点,您必须提前两小时到那里.可知,应该是"中午",选B.19.答案:C.考查形容词.A忙的.B惊讶的.C生病的.D无聊的.句意"我是___".根据下一句I have a stomachache我胃疼.可知,应该是"生病的",选C.20.答案:A.考查名词.A药.B汤.C食物.D牛奶.句意"她给了我一匙__".前面说胃疼,因此医生妈妈给了他"药",选A.21.答案:B.考查搭配.A起飞.B登记、记录.C四下观望.D回电话.句意"当我们到达时,我站在一条长长的队伍里__.".可知,应该是"登记(登机)".选B.22.答案:C.考查形容词.A伤心的.B累的.C紧张的.D专门的.句意"我有一点___.".根据下一句I check my bag and walk away."I don't feel well我检查我的包,走开了.我觉得不舒服.可知,应该是"紧张的".选C.23.答案:C.考查副词.A开心地.B生气地.C轻轻地、温柔地.D严厉地.句意"她__抚摸着我的前额.".根据下一句You don't have a fever你没有发烧.可知,应该是"轻轻地",选C.24.答案:D.考查副词.A害羞地.B匆忙地.C安静地.D自信地.句意"我__告诉爸爸妈妈.".根据上一句I'm sure I'm ready now我确信我已经准备好了.可知,应该是"自信地",选D.25.答案:D.考查动词.A笑.B认为.C跳.D挥手.句意"我转过身去___".根据最后一句Now I'm ready to fly.Goodbye!现在我准备起飞了.再见!可知,应该是"挥手".选D.。
2019届秋季上学期高二语文8月月考试题(含解析) (91)
河北省唐山市玉田县2018-2019学年高一化学上学期期中试题(扫描
版)
2018-2019第一学期期中高一化学参考答案
选择题(每题2分,共48分)
非选择题(共52分)
25.(10分;每空2分)
(1)渗析(2)适量
..KCl (3)熔融KI (4)4 (5)22.4bc/(aN A)L 26.(10分)
(1)玻璃棒(2分)
(2)DBA(2分;其余答案不得分)
(3)氯气( Cl2) (1分)红(1分) Cl2+NaOH=NaCl+NaClO+H2O反应(2分)(4)BCD(2分;部分且正确1分)
27.(9分)
(1)500ml容量瓶(2分;只写容量瓶不给分)(2)33.1 (2分)
(3)洗涤烧杯和玻璃棒(1分;其余答案不得分)
1—2cm(1分)凹液面恰好与刻度相切(1分)
(4)③④(选全2分;漏选且正确1分)
28.(11分)
(1)分液漏斗(2分)
(2)4HCl(浓)+MnO2MnCl2+Cl2↑+2H2O(2分)
(3)浓硫酸(2分)
(4)2Fe+3Cl22FeCl3(2分)产生棕(褐)色的烟(1分)
(5)吸收尾气中未反应的氯气和防止空气中水蒸气进入装置D(2分)
29. (4分;每空2分)(1)11.9 mol·L-1(无单位不给分)(2)16.8 30.(8分;每空2分)
(1)略(2)还原性和酸性(2分;部分且正确1分)(3) 0.5 5.6。
2019届秋季上学期高二语文8月月考试题(含解析) (1008)
15.5串并联电路中电流的规律1.在“探究串联电路中的电流特点”实验中,某同学用电流表分别测出图中A、B、C三处的电流大小,并初步得到它们之间关系的结论.为了进一步探究它们之间的关系,下一步他的操作是()A.将电源两极对调,再次测量A、B、C三处的电流B.改变开关S的位置,再次测量A、B、C三处的电流C.将图中两只灯泡位置对调,再次测量A、B、C三处的电流D.换用不同规格的灯泡,再次测量A、B、C三处的电流2.一同学在探究串联电路的电流规律时,按甲图连接好电路.闭合开关S后观察到两个电流表的偏转情况如乙、丙两图所示.下列说法正确的是()A.两灯的两端电压一定不同 B.两灯的电阻一定不同C.通过两灯的电流一定相等 D.两灯的亮度一定相同3.如图所示,在探究并联电路电流关系时,小明用电流表测出A、B、C三处电流分别为I A=0.5A,I B=0.3A,I C=0.2A,记录数据后,下一步首先应该做的是()A.分析数据,得出结论 B.换用不同规格的小灯泡,再测出几组电流值C.换用电流表的另一量程,再测出一组电流值 D.整理器材,结束实验4.小明通过实验研究串联电路中的电流关系,实验电路如图所示,闭合开关S后,灯泡L1、L2均不发光,且电流表示数为零.他用电流表检测电路故障,将电流表的正、负接线柱分别与a、b两点相连接,灯L2发光,电流表的示数为0.3A;将电流表的正、负接线柱分别与b、c两点相连接,灯L1、L2均不发光,且电流表的示数为零.若电路中只有一处故障,下列对于故障的判断正确的是()A.灯L1处出现了短路B.灯L2处出现了短路 C.灯L1处出现了断路D.灯L2处出现了断路5 . 在探究串、并联电路电流关系的时候,测量完一组数据后,还要换另外两只不同规格的灯泡再次测量,这是为了()A.为了使测量得到的数据更准确 B.为防止灯泡损坏影响实验结果C.为获得普遍适用的结论 D.看其中哪组数据更准确就填哪一组6.如图是某同学在一次实验探究中所连接的电路.开关S1、S2都闭合时,电流表的示数是1.2A,S2断开时,电流表的示数变化了0.5A.下列判断正确的是()A.通过L1的电流为1.2A B.通过L1的电流为0.5AC.通过L2的电流为0.5A D.通过L2的电流为0.7A7.如图所示,A1、A2、A3三个电流表的示数分别为I1、I2、I3,则有()A.I1=I2+I3B.I1=I2=I3C.I1>I2>I3 D.I1<I2<I38.同一电路中有甲、乙两灯泡,已知通过两灯泡的电流分别为0.2A、0.5A,则它们是()A.肯定是串联 B.肯定是并联C.一定不是并联 D.可能是串联,可能是并联9.如图所示,在探究并联电路的电流关系时,小明把阻值不等的两个灯泡接入电路中,用电流表测出通过A、B、C三点的电流分别为I A、I B、I C.关于它们之间的大小关系,正确的是()A.I A= I B = I C B.I A>I B = I C C.I A= I B + I C D.I A<I B<I C10. 如图开关从闭合到断开,电流表A1和A2的示数I1、I2的变化()A、I1变小I2变大 B.I1不变I2变大C.I1变大I2变小 D.I1不变I2变小11题图 12题图 13题图 14题图11.如图所示,两只电流表都有0.6A和3A两个量程,当开关S闭合后,两电流表指针偏转角度相同,则通过L1、L2两灯的电流之比为()A.I1:I2=4:1 B.I1:I2=1:4 C.I1:I2=5:1 D.I1:I2=1:512.如图所示,闭合开关后,L1、L2、L3中的电流分别是0.2A、0.2A、0.3A,则电流表的示数()A.0.2A B.0.5A C.0.7A D.0.4A13.如图所示的电路中,闭合开关后,已知流过灯L1的电流为I1,流过灯L2的电流为I2(I1>I2),则电流表的读数应等于()A.I1B.I2C.I1- I2D.I1+ I214.如图所示,若当开关闭合时电流表A1的示数为0.6A,A2示数0.4A,则L1和L2中电流分别是()A.0.6A,0.4A B.0.2A,0.4A C.0.4A,0.6A D.0.4A,0.2A15.串联在同一电路里的两盏灯L1、L2,当闭合开关后发现L1比L2亮,关于经过它们的电流,下列说法正确的是()A.L1的电流大 B.L2的电流大 C.相等 D.无法比较它们的电流大小16.如图所示,电流表A1的示数为1.6A,电流表A2的示数为0.8A,则L1中的电流是____A,L2中的电流是____A.17.小明家中装有一台电视机、一台洗衣机、两盏照明灯,正常工作时的电流分别为200mA、1A和250mA.如果电路中的电流不允许超过3A,他家最多还能再装300mA的照明灯____ 盏.18.“红灯停,绿灯行,黄灯也要等一等,交通安全要注意”.路口的这些交通指示灯是_ ___ 的(选填“串联”或“并联”).有时红灯快结束时黄灯也同时亮了,此时电路中的总电流__ _(选填“变大”、“不变”或“变小”).19.如图甲所示电路,当开关S闭合后,电流表的指针偏转如图乙所示,其中a电流表测量的是通过____(选填“电源”、“ L1”或“L2”)的电流,b电流表的读数应为____A.20.家有一台电视机、一台电冰箱、一台洗衣机和4盏相同规格的电灯,工作时通过的电流分别是200mA、400mA、1A和0.18A(一盏电灯),若这些电器同时使用,干路中的电流是 ____A.21.在“探究并联电路中电流特点”的实验中,某同学连接了如图所示的电路:(1)该同学连接电路时开关应______________.(2)该同学连好电路后闭合开关,观察到灯泡_______不发光,其原因是______________.(3)随后该同学在原电路上只改动了一根导线便完成了实验.请你在图中改动的一根导线上画“×”,并用笔线代替导线画出正确的电路,使两只电流表分别测干路和支路的电流.(4)排除故障后闭合开关,电流表A1和A2的示数如图所示,则通过L2的电流为________A.22.小明同学做“用电流表测电流”实验的电路如图所示,请用笔线代替导线将电路连接完整,使灯L1和L2并联连接,电流表测量通过灯L1的电流.23 . 如图是“探究串联电路电流特点”的实验电路图:(1)实验中,选择两个小灯泡的规格应该是______的.(填“相同”或“不相同”).(2)下表是某同学实验中的一组数据:由表格所记录的数据可得出结论:______________________________.(3)请你分析说明小明同学这一实验方案中的不足:_________________________.(4)实验中某同学发现两个串联的小灯泡中,一个发光,一个不发光,造成其中一个小灯泡不发光的原因是_____ ______.A.通过这个灯泡的电流比另一个灯泡的电流小 B.灯泡的灯丝断了C.该小灯泡灯座处可能短路了 D.小灯泡靠近负极.24.如图是小明探究串联电路电流特点的实验电路图:(1)如图1,小明连电路时把一只开关和两个小灯泡连接后,刚将线路两端接到电源两极,L2就亮了,但L1没亮.他在实验操作中不当之处是:_______________________________.实验时L1没亮的原因可能是_______________________________.A.通过灯泡L1的电流比L2中的电流小 B.该灯泡的灯丝断了C.该小灯泡灯座处可能短路了 D.该灯泡靠近电源负极(2)甲、乙两同学在做实验时,闭合开关前,电流表的指针均指在零刻度处;当闭合开关试触时,发现电流表指针摆动分别出现了如图2甲、乙所示的两种情况.请分析他们在电流表的使用上分别存在什么问题?(填在下面横线上)甲: _______________________________.乙:_______________________________.25.在“探究并联电路中电流的关系”的实验中小明把电流表分别接入到电路中的A、B、C处,测出它们的电流,填入下表;(1)下面设计的表格中存在的不足之处是_________________;0.22(2)为了防止个别偶然因素的影响,完成后面两次实验所采用方法是_____ ______;以得出结论:并联电路干路中的电流等于______________.。
2019届秋季上学期高二语文8月月考试题(含解析) (1144)
存瑞中学2018-2019学年度第一学期期中考试高三数学(理)试题(存瑞部)一.选择题(本大题共12小题,每小题5分,共60分.每小题中只有一项符合题目要求)1.已知集合,,则()A. B. C. D.【答案】B2.已知,为虚数单位,若为实数,则的值为()A. 4B. 3C. 2D. 1【答案】A3.《孙子算经》是我国古代的数学名著,书中有如下问题:“今有五等诸侯,共分橘子六十颗,人别加三颗.问: 五人各得几何?”其意思为: 有5个人分60个橘子,他们分得的橘子数成公差为3的等差数列,问5人各得多少个橘子.这个问题中,得到橘子最多的人所得的橘子个数是()A. 15B. 16C. 18D. 21【答案】C4.已知,,,则()A. B. C. D.【答案】B5.执行如图所示的的程序框图,则输出的( )A. 4B.C. 5D. 6【答案】B6.某商场一年中各月份的收入、支出情况的统计如图所示,下列说法中错误..的是A. 至月份的收入的变化率与至月份的收入的变化率相同B. 支出最高值与支出最低值的比是C. 第三季度平均收入为万元D. 利润最高的月份是月份【答案】D7.学校艺术节对同一类的四项参赛作品,只评一项一等奖,在评奖揭晓前,甲、乙、丙、丁四位同学对这四项参赛作品预测如下:甲说:“或作品获得一等奖”;乙说:“作品获得一等奖”;丙说:“,两项作品未获得一等奖”;丁说:“作品获得一等奖”.若这四位同学只有两位说的话是对的,则获得一等奖的作品是()A. 作品B. 作品C. 作品D. 作品8.某几何体三视图如图所示,则该几何体的表面积为()A. B. C. D.【答案】C9.设抛物线的焦点为,过点且倾斜角为的直线与抛物线交于两点,若,则抛物线的准线方程为()A. B. C. D.【答案】A10.若函数满足且的最小值为,则函数的单调递增区间为()A. B.C. D.11.定义在上的偶函数满足:对任意的实数都有,且,。
2019届秋季上学期高二语文8月月考试题(含解析) (1059)
Unit2 How often do you exercise?【新词必备】1. housewo rk (不可数名词)家务劳动;家务事.2.hardly ever 几乎从不3. hardly(adv.)几乎不;几乎没有---hard(adj./adv.)坚硬的;困难的;努力地;猛烈地4. once(adv.)一次;曾经---one一---first第一5. twice(adv.)两次;两倍---two二---second 第二6. Internet (n.)(国际)互联网;因特网 surf the Internet 上网7. full(adj.) 忙的;满的;饱的be full of =be filled with 充满…… eg: The classroom is full of students.8. swing(v. ---swung---swung / n.) 摇摆;摆动;秋千9. maybe(adv.)= perhaps 或许;大概;可能10. least(adv./adj./pron.)---little---less 最小;最少;最小的;最少的11. at least 至少【单元语法精讲】频度副词1. 频度副词的含义:表示事情发生频率的副词称为频率副词。
(1)常用的频率副词有: always总是; usually通常; often经常; sometimes有时; seldom很少; hardly ever几乎不; never从不等。
表示具体的频率、次数时,一次用once; 两次用twice; 三次及以上用基数词+times;2. 频率副词在句中的位置频率副词一般用在实义动词之前, be动词、助动词或情态动词之后,有时为了强调,也可置于句首 (注意: always 一般不用于句首,在祈使句中除外Always remember this.)。
We never eat junk food./Lucy is sometimes very busy./I can hardly say a word. Sometimes Jack plays computer games.3. 对频率副词提问时,用how often。
2019届秋季上学期高二语文8月月考试题(含解析) (790)
题型一听力理解听力特训(一)第一节听下面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答案。
每段对话读两遍。
1.What does the woman want to buy?A. A T-shirt.B. A shirt.C. A skirt.2.When can David watch football matches?A. On Friday evenings.B. On Saturday evenings.C. On Sunday evenings.3.What is the boy looking for?A. His socks.B. His gloves.C. His schoolbag.4.What sport does Mary like?A. Swimming.B. Skating.C. Running.5.How is the man going to the farm?A. By bus.B. By car.C. By subway.第二节听下面几段对话或独白。
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答案。
每段对话或独白读两遍。
听下面一段对话,回答第6至第7两个小题。
6.Where is Bob's T-shirt?A. On the sofa.B. On the bed.C. On the chair.7.What color is Bob's T-shirt?A. Black.B. Blue.C. White.听下面一段对话,回答第8至第10三个小题。
8.What's the matter with the man?A. He has a cold.B. He has a cough.C. He has a headache.9.How long has the man been like this?A. For two days.B. For seven days.C. For three days.10.What does the woman advise the man to do?A. To have a rest.B. To see a doctor.C. To take some medicine.听下面一段独白,回答第11至第12两个小题。
- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
全等三角形课后作业题十五
1.下列关于全等三角形的说法不正确的是()
A、全等三角形的大小相等
B、两个等边三角形一定是全等三角形
C、全等三角形的形状相同
D、全等三角形的对应边相等
2.如图,已知∠DCE=90°,∠DAC=90°,BE⊥AC于B,且DC=EC,若BE=8,AB=3,则AD的长为()
A. 3 B. 5 C. 4 D.不确定
3.如图,在四边形ABCD中,∠C=50°,∠B=∠D=90°,点E、F分别是线段BC、DC上的的动点.当三角形AEF的周长最小时,∠EAF的度数为()
A. 80° B. 70° C. 60° D. 50°
4.4.在△ABC中和△DEF中,已知AC=DF,∠C=∠F,增加下列条件后还不能判定△ABC≌△DEF的是()A. BC=EF B. AB=DE C.∠A=∠D D.∠B=∠E
5.已知△ABC中,AB=5,AC=7,则BC边上的中线a的取值范围是()
A.1<a<6 B.5<a<7 C.2<a<12 D.10<a<14
6.如图,在∠AOB的两边上,分别取OM=ON,再分别过点M、N作OA、OB的垂线,交点为P,画射线OP,则OP平分∠AOB的依据是()
A. SAS B. SSS C. AAS D. HL
7.如图,三角形ABC 中,∠A 的平分线交BC 于点D ,过点D 作DE ⊥AC ,DF ⊥AB ,垂足分别为E ,F ,下面四个结论:①∠AFE=∠AEF ;②AD 垂直平分EF ;③BFD CED S
BF S CE
=;④EF ∥
BC .其中正确的是 ( )
A .①②③
B .②③④
C .①③④
D .①②③④
8.如图,已知△ABC 中,∠ABC =90°,AB =BC ,三角形的顶点在相互平行的三条直线l 1,l 2,l 3上,且l 1,l 2之间的距离为2, l 2,
l 3之间的距离为3,则AC 的长是( )
A .
.
. . 7
9.如图,在△ABC 中,延长中线AD 到
E ,使DE=AD ,则下列结论中成立的是( )
A . DE=DC
B . CE=AB
C . CE=CB
D . AE=BC
10.如图,OP 平分AOB ∠,PA OA ⊥,PB OB ⊥,垂足分别为A ,B .
下列结论中不一定成立的是( )
A .PA P
B = B .PO 平分APB ∠
C .OA OB =
D .AB 垂直平分OP
11.如图,已知△ABC 三个内角的平分线交于点O ,点D 在CA 的延长线上,且DC=BC ,AD=AO ,若80BAC ∠=︒,则BCA ∠的度数为____________.
12.如图,∠AOB=90°,OE是∠AOB的平分线,OD是∠B OC的平分线,若∠EOD=70°,则∠BOC的度数是_______.
13.一个角的余角为,则这个角的补角为________________。
14.如图,AD是△ABC中∠BAC的角平分线,DE⊥AB于点E,S△ABC=7,DE=2,AB=4,则AC长是()
A. 3 B. 4 C. 6 D. 5
15.如图,已知△ABC≌△DCB,∠BDC=35°,∠DBC=50°,则∠ABD=________.
16.如图,∠B=∠D=90°,BC=DC,∠1=40°,则∠2=______°.
17.如图,在△ABC中,AB=12,AC=8,AD是BC边上的中线,则AD的取值范围是____________.
18.如图,△ABC 中,AB =16,BC =10,AM 平分∠BAC ,∠BAM =15°,点D 、E 分别为AM 、AB 的动点,则BD +DE 的最小值是 .
A
E
B M
C D
19.19.如图,已知AD //BC ,∠B=32︒,DB 平分∠ADE ,则∠DE
C=________.
20.如图,AC=BD ,要使ΔABC ≌ΔDCB ,只要添加一个条件
___________________.
21.如图,AB 与CD 相交于O ,OE 平分∠AOC ,OF ⊥AB 于O ,OG ⊥OE 于O ,若∠BOD=40°,求∠AOE 和∠FOG 的度数.
22.如图,点E 是AOB ∠平分线上一点,OB ED OA EC ⊥⊥,,垂足分别是D C ,.
求证:(1)△DEO≌△CEO
(2)OE是线段CD的垂直平分线。
23.已知:如图DA=CB,∠ADC=∠BCD.求证:∠ADB=∠BCA. (8分)
24.已知如图,在△ABC中,以AB、AC为直角边, 分别向外作等腰直角三角形ABE、ACF,连结EF,过点A作AD ⊥BC,垂足为D,反向延长DA交EF于点M.
(1)用圆规比较EM与FM的大小.
(2)你能说明由(1)中所得结论的道理吗?
25.已知:如图,AB=D C ,AE=BF ,CE=DF ,求证:AE//BF .
26.如图,AB=AD ,AC 平分∠DAB ,求证:△ABC ≌△
ADC
27.如图,∠AOB=90°,∠BOC=2∠BOD ,OD 平分∠AOC ,求∠BOD 的度数.
28.如图,已知△ABC ≌△ADE ,BC 的边长线交AD 于F ,交AE 于G ,∠ACB=105°,∠CAD=10°,∠ADE=25°,求∠DFB 和∠AGB 的度数.
B
A G
E F C D。