惠州市2020届高三第二次调研考试(含参考答案)

惠州市2020届高三第二次调研考试(含参考答案)
惠州市2020届高三第二次调研考试(含参考答案)

惠州市2020届高三第二次调研考试

英语

2019.10 本试卷分选择题和非选择题两部分。满分120分(最终成绩按总分135分进行折算),考试用时120分钟。

注意事项:

1. 本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。

2. 答题前,考生务必将自己的姓名,准考证号填写在答题卡相应的位置。

3. 全部答案应在答题卡上完成,答在本试卷上无效。

4. 考试结束后,将答题卡交回。

第I卷

第二部分阅读理解(共两节,满分40分)

第一节(共15小题;每小题2分,满分30分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

A

Need a fall fix? Try one from these great places.

1.Mackinac Island, Michigan

The only way to reach this famed car-free island is by boat and ferry, and once visitors arrive, they are attracted by the history, scenery and fall colors.“It’s a throwback to years past, a little town, and there’s a big state park as well,”Blackwell says. “ You’re allowed to have boats all around the island.”

2.Tellico Lake, Tennessee

With nearly 400 miles of shoreline, this waterway flowing ou of he Great Smoky Mountains is largely unexploited, well-protected in its natural state. Fall visitors find a range of colors reflecting in the clean waters, says Blackwell, who vacationed in the area with his family as a child. “The thick forest there just allows you to see more greenery and wildlife."

3.Dillon Reservoir, Colorado

With an hour from Denver, this lake is home to what claims to be the nation's highest sailing club, at an altitude of more than 9,000 feet. Marinas in the towns of Dillon and Frisco make it easy to get out on he water and to see the bright yellows and golds of fall leaves. “ People are surprised that there's boating in Colorado, and you can see the mountains just before the snowball," Blackwell says.

4. Lake Monroe, Indiana

The state’s largest lake is surrounded by more than 13,000 acres of protected forest and three recreation areas, making it an ideal place to see fall colors, particularly from oaks and the tulip poplar, the state tree. “ It’s a gem (宝石) in southern Indiana," says Blackwell, who grew up in the area. “There are lots of different activities: canoeing, kayaking and fishing.”

21.What is special about Mackinac Island?

A.It’s like a modern city.

B. Visitors can’t take a boat around it.

B.Visitors can see various wildlife there. D. Visitors can’t go there by cars.

22.Which is suitable for someone looking for an undeveloped place for vacation?

A.Mackinac Island, Michigan

B. Tellico Lake, Tennessee

C.Dillon Reservoir, Colorado

D. Lake Monroe, Indiana

23. What do the four places have in common?

A. Blackwell once travelled there.

B. They are all famous tourist destinations.

C. They are surrounded by thick forests.

D. Visitors can enjoy fall colors there.

B

When HarmonyOs, the Chinese self-developed operating system for Huawei mobile devices, was released on Aug 9, it quickly became a hot topic on social media. Many believe it not only represents the rise of the country as a tech power, but also shows respect to classical Chinese culture by naming the system "Hongmcng " in Chinese.

"Hongmeng" is a classical word from Zhuangzi. In the ancient times of Chinese legend and myths (神话),“Hongmeng" was used to describe the original state of the universe before matter existed. For HarmonyOS, "Hongmeng" indicates the developers’ aim to make an innovative operating system, unlike any other.

Besides "Hongmeng'", Hunwei has also registered many of its products under the names of legendary creatures from Chinese myths. For example, the company's Kirin mobile chip got its name after a lucky monster called "Qilin". And its server chip is calked "Kunpeng”, a creature that changed from a fish into a giant bird.

Many Chinese Internet users and media have praised Huawei's use of these names," as they stand for Chinese wisdom and ancient people’s imagination and spirit of exploration”, Global Times noted.

In fact, Huawei is not alone in using traditional culture for modern ventures. Ne Zha, the new film, also portrays traditional culture in a modern context. The movie is loosely based on the well-known work of classical Chinese myth The Investiture of the Gods. Earlier this month it became the biggest animated movie in China and

was called “ the glory of domestic anime (国产动漫)”.

Indeed, the long history and splendid classic works have given China a profound culture. Myths and legends are the creative works of tremendous imagination. As Global Times put it, today by revisiting a modern context, “ancient myths has the power to inspire imagination in young people”. After all, imagination is the beginning of creation.

24.What do we know about HamonyOS?

A.Its release raised a storm of objections.

B.It is named after creature in myth.

C.It combines high technology and culture.

D.It's the best operating system.

25.Which of the following best explains "innovat ive” underlined in Paragraph 2?

A.creative

B. modern

C. popular

D. intelligent

26. How do the public think of Huawei's use of the names?

A. Confused.

B. Unexpected.

C. Approving.

D. Doubtful.

27. What can be inferred from the last two paragraphs?

A. The film Ne Zha is not adapted from myths.

B. The film Ne Zha is a big hit.

C. More businesses follow Huawei's lead.

D. Ancient myths is a good choice for entertainment.

C

People who sleep fewer than six hours a night are more likely to die early, researchers in University of Warwick have found in a recent study. They discovered that people who slept for less than six hours each night were 12% more likely to die before the age of 65 than those who slept the recommended six to eight hours a night.

The researchers pointed out that previous studies had shown that the lack of sleep was associated with problems like heart disease and high blood pressure. However, the researchers also found that sleeping too much was linked to an early death. Those who slept for more than nine hours a night were 30% more likely to die early, as an article in the latest Sleep suggested. That directly contradicts another passage in the same journal last month suggesting that people who slept for ten hours or longer a night were more likely to live to 100. This was thought to be because people who lived into extreme old age were healthier and therefore slept better.

However, the authors of the latest research contradicted this and suggested that long sleep was a sign of

underlying illnesses such as depression and low levels of physical activity. Professor Francesco Cappuccio at the University of Warwick said: “While short sleep may represent a cause of ill-health, long sleep is believed to represent more an indicator of ill-health.”

He also mentioned: “ Modern society has seen a gradual reduction in the average amount of sleep people take, and this pattern is more common among full-time workers, suggesting that it may be due to social pressures for longer working hours. On the other hand, the worsening of our health is often accompanied by an extension of our sleeping time.”

“Consistently sleeping six to eight hours per night may be good for health. However, whether to achieve the goal depends on various factors such as the environment as well as measures of public health aimed at favourable changes of the working environments,” Professor Francesco Cappuccio added.

28.What did researchers in University of Warwick

A.People who sleep fewer than 6 hours each night die before 65.

B.Sleeping for more than 9 hours a night does good to one's health.

C.Six to eight hours’ sleep can be appropriate for people.

D.People at an old age are healthier because they sleep longer.

29.What is Professor Francesco Cappuccio most likely to agree with?

A.Long sleep is what causes our health problems.

B.Modern people sleep less because they work longer.

C.Our health becomes worse because we sleep less.

D.How long we sleep depends on our education.

30.What did the researcher think may help people have proper sleep?

A.Social pressure.

B. Longer working hours.

C.Extension of sleeping time.

D. Changes of working environments.

31. What can be the best title for this passage?

A. How Long Should We Sleep

B. Longer Sleep Makes Better Health

C. Time to Sleep Early

D. The Importance of Sleep

D

Imagine a school where self-awareness is celebrated, students are encouraged to solve maths problems by writing on the walls and applying learned lessons to real life is more important than homework. These are a few of the concepts that makes Space of Mind School unique.

Located in a home built in 1896 in Florida, US, the program serves students in grades 2 through 12 and will accept kindergarten students next year. It also offers an after-school program for students who attend traditional schools, as well as evening programs for adults and educators and weekend events for families.

There is a different atmosphere from that of a traditional school building. Tables and brightly colored walls are white boards. In the science room, students are studying climate changes at a weather station, while in the music room, a student is solving an equation (等式) with his academic coach while he connects music theory and maths.

The daily schedule at the school also stands out. “ We don’t assign boring or exhausting homework.” said Space of Mind founder and CEO Ali Kaufman. “ Instead of homework, we ask that they go home and take a video of themselves applying a lesson they learned or cooking a meal for their family that they learned how to make at school.”

For lunch, instead of traditional cafeteria dishes such as pizza, the school offers organic meals made out of products from local gardens and farms. “ Our students also run a business at the Delray Beach Green Market on Saturdays so they can understand sustainable living practices and how to run a business,” Kafman said.

“ We are also the first school program in Florida to start and end each day with 15 minutes of meditation (冥想),” Kaufman said. “ The positive results we have been seeing in the students from meditation are amazing. We are really about infusing social, emotional and creative skills with academic and life skills.”

32.Space of Mind School_________.

A.assigns no homework.

B. urges students to use what they learn

C.teaches students to earn money in class

D. focuses on knowledge learning

33. What can be inferred from the last paragraph?

A. Yoga enjoys great popularity in US.

B. The practice of meditation is amazing.

C. The meditation session lasts 15 minutes daily.

D.The students benefit from meditation.

34. The underlined word “infusing" in the last paragraph probably means______.

A. emphasizing

B. checking

C. developing

D. helping

35. What is the text mainly about?

A. What makes Space of Mind School outstanding.

B. Why Space of Mind School is popular in US.

C. How the after-class programs of space of Mind School are organized.

D. How Space of Mind School cultivates students' life skills.

第二节(共5小题,每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Make Your Fitness Resolutions Stick

Last year, the most common New Year’s resolution was fitness-related. A study showed that roughly 50 million Americans pledged (发誓) to increase activity and lose weight. 36._______, success was hard to achieve. Two months later, only 37 percent of people in their 20s and 16 percent over age 50 had kept to their new fitness habit.

37._______, the benefits of such a change are clear. There is no question that exercise plays a role in the prevention and treatment of many diseases. Weekly exercise routines have been shown to reduce rates of depression and anxiety, lessen risk of heart attack and stroke, and reduce the prevalence of diabetes.

38.______. It’s suggested that 150 minutes per week of moderate intensity exercise like swimming, of 75 minutes per week of intense exercise, like jogging, should be the minimum amount of exercise needed to achieve maximum medical benefits.

Often the best way to increase your exercise is to incorporate (融合) movement into your everyday life. On average, urban citizens who walk by walk, bike or public transportation are fitter than suburban citizens who drive to work. Besides, taking the stairs instead of the elevator also helps. 39.________.

Whether you resolve to work out at your local gym three times a week, take 10, 000 steps a day or give your dog an extra walk every day, what matters most was not your commitment to exercise but your sticking to it.

40._______.

A.While they have good intentions

B.Although behavior change is tough

C.However hard they try to make a change

D.There is always one type of exercise that you are fond of

E.So commit to something you love and keep to your fitness habit

F.They are good ways to increase the amount of your movement every day

G.The best form of exercise is the type that someone will consistently perform

第三部分英语知识运用(共两节,满分45分)

第一节完形填空(共20 小题;每小题1.5分,满分30分)

阅读下面短文,从短文后各题所给的四个选项(A, B, C, D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

Trees have always held much attraction for people. They are the 41._____ and biggest life-forms on our

planet and one of the most beautiful. As a direct 42.______with thousands of years of history, trees appear in many religions and have 43._____ artists over the years.

When I was a child I 44.______a science fiction story that made me think about trees in a new way. In the story, 45._____ from an advanced civilization come to our planet and their spaceship 46._____in the middle of a forest. The aliens (外星人) have a long 47._____with the trees of the forest and then leave, 48._____to think that the inhabitants (居民) of Earth are noble, intelligent and peaceful.

Trees 49.______a lot about being part of a community and how cooperation is better for a society than 50._____. Scientists are only just beginning to understand how it all 51.______, but we now know that trees growing together share all of the available resources (资源) with each other. So, strong trees in a good 52._____ will share food and water with 53.______ trees that receive less sunlight. By 54.______, a community of trees makes itself stronger. The 55.______of giant redwood trees, for example, grow together under the ground. It’s as if they are 56.______hands. This means that they are 57.______stronger when there are heavy winds or floods.

We all acknowledge that trees are 58._____ for the environment and the survival of our 59.______. Perhaps they have even more to 60._____ us in the future.

41.A. kindest B.oldest C.heaviest D.fittest

42.A. link B.league C.culture D.agreement

43.A. governed B.sponsored C.inspired D.tricked

44.A. took in B. came across C.set aside D.kept up

45.A. workers B.researchers C.visitors D.invaders

46.A. lands B.drops C.flies D.shoots

47.A. translation B.word C.cooperation D.conversation

48.A. curious B.happy C.desperate D.grateful

49.A. get B.know C.afford D.send

50.A. regulations B.management https://www.360docs.net/doc/2b16452579.html,petition D.construction

51.A. learns B.ends C.grows D.works

52.A. position B.manner C.rank D.model

53.A. lower B.slower C.weaker D.cheaper

54.A. pulling back B.bringing up C.fighting back D.teaming up

55.A. branches B.fruits C.leaves D.roots

56.A. holding B.clapping C.waving D.raising

57.A. nearly B.really C.only D.merely

58.A. popular B.suitable C.vital D.normal

59.A. city B.country C.continent D.planet

60.A. offer B.take C.pay D.study

第二节(共10 小题;每小题 1.5 分,满分15分)

阅读下面材料,在空白处填人适当的内容(1个单词)或括号内单词的正确形式。

I recently heard a story about a famous scientist. When he 61._________(ask) why he was able to succeed, he gave the answer. It all came from an experience with 62._________ mother when he was about two years old. “I was trying to get a bottle of milk from the fridge when I lost the bottle and it fell, spilling (溢出) the milk all over the floor-a sea of milk! I got 63.____________ (frighten) and I didn’t know what to do!” he said.

Instead of 64.___________(punish) him, his mother asked him to play in the milk for a while. Then she said, “You know, we failed in how to 65.____________(successful) carry a big milk bottle with two tiny 66.____________(hand) just now. Let’s go out in the yard and fill the bottle 67.________ water to see if you can discover a way to carry it.”

This famous scientist then remarked that it was at that moment that he 68._________(know) he didn’t need to be afraid to make mistakes 69._________ were actually opportunities for learning something new. Even if the experiment “doesn’t work”, we usually learn something 70.________(value) from it.

第四部分写作(共两节满分35)

第一节短文改错(共10小题;每小题1分,满分10分)

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号( ),并在其下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1. 每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从第11处起)不计分。

During the National holiday, I tried a new way to explore the Forbidden City, where left me deep impression. To avoid waste time buying a ticket on the spot, I made a reservation online. I got my ticket from a machine without difficulty and start the exploration. I was deep attracted by the grand architecture. To my excited, I could scan the QR codes to get detailed informations. With the VR glasses on, I even found me back to the time

when the palace was under construction. How impressive! I found the Forbidden City both traditional or modem because of our history is made alive here.

第二节书面表达(满分25分)

假定你是李华,你校学生会将举行“我和我的祖国”微电影作品展览活动。你的英国朋友Peter很感兴趣,来信询问相关事宜。请你写一封回信并邀请他参加。要点如下:

1. 活动介绍;

2. 作品要求;

3. 欢迎Peter参加。

注意:

1.词数100左右;

2.可以适当增加细节,以使行文连贯。

参考词汇:微电影microfilm

Dear Peter,

___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ Looking forward to your participation.

Yours,

Li Hua

参考答案:

阅读理解:

21-25 DBDCA 26-30 CBCBD 31-35 ABDCA

七选五:

36-40 ABGFE

完形填空:

41-45 BACBC 46-50 ADBBC 51-55 DACDD 56-60 ABCDA

语法填空:

61.was asked 62. his 63. frightened 64. punishing 65. successfully

66.hands 67. with 68. knew 69. which/that 70. valuable

短文改错:

1.where 改为which

2. deep 前加a

3. waste改为wasting

4. start改为started

5.deep改为deeply

6. excited改为excitement

7. informations改为information

8.me改为myself

9. or改为and 10. 去掉of

写作:

Dear Peter,

Hearing that you are interested in the Microfilm Exhibition Activity organized by our Students' Union. I feel it my pleasure to introduce to you some relevant information about it.

Scheduled to be held in mid-November, the activity aims to share the recorded wonderful moments of how the younger generations show their love for their motherland. So meaningful is the activity that it will surely offer us a great opportunity to embrace our cultural roots. Anyone who is interested and skilled at video-making can sign up for it. The microfilm is required to be a 15-minute one and should be handed in before the end of October.

I am convinced that it will also serve as a good chance for you to show your talent for shooting a film as well as your love for your country. Seize this chance and you won't regret it.

Looking forward to your participation.

Yours,

Li Hua

惠州市2021届高三第二次调研考试英语试题

惠州市2021届高三第二次调研考试 英语(2020.10) 试卷共8页,卷面满分120分,折算成130分计入总分。考试用时120分钟。 注意事项: 1.答题前,先将自己的姓名、准考证号填写在答题卡上。 2.选择题的作答:每小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。写在试题卷、 草稿纸和答题卡的非答题区域均无效。 3.非选择题的作答:用签字笔直接答在答题卡上对应的答题区域内。写在试题卷、草稿纸和答题卡 的非答题区域均无效。 4.考试结束后,请将答题卡上交。 第一部分阅读理解(共两节,满分50分) 第一节(共15小题;每小题2.5分,满分37.5分) 阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。 A Things To Do in Los Angeles on Labor Day weekend, September 18-20, 2020 Families will find fun things to do with your kids this weekend from September 18th to 20th. Make some art, visit a museum, enjoy a drive-in movie, and more! Bowers Museum 2002 N. Main St., Santa Ana, CA 92706 The Bowers Museum is now open and ready to safely welcome your family. Current exhibitions include Inside the Walt Disney Archives: 50 Years of Preserving the Magic, a 10,000-square-foot traveling exhibit that features more than 400 objects. Timed tickets will be required. Make your reservation online. The Virtual Orange County Children’s Book Festival 3857 Birch Street, Suite 414, Newport Beach, CA 92660 The Virtual Orange County Children’s Book Festival begins on Monday, September 14th and continues until Saturday, September 26th. A variety of activities are planned including story times, illustrating demonstrations, interactive activities, discussion panels, and much more. Check the website for a complete schedule of events. Sawdust Art Festival: An Outdoor Marketplace 935 Laguna Canyon Rd., Laguna Beach, CA 92651 The Sawdust Art Festival: An Outdoor Marketplace opens this weekend on Saturday, September 19th from 10:00 am to 6:00 pm. The Outdoor Marketplace will be open on weekends only, and advance tickets are required. Families will have the opportunity to safely shop, watch live art demonstrations, and enjoy outdoor dining and live music. Tickets are available online. Admission is $10 for adults and free for kids 12 and under. Drive-In Movies at the Mall: The Princess Bride 500 Lakewood Mall, Lakewood, CA Enjoy a drive-in screening of The Princess Bride at the Lakewood Center Mall on Saturday, September 19th. The movie starts at 8:00 pm and the parking lot is not accessible until 7:00 pm. A free goody bag will be provided to each car. Tickets are available online. 1. Which of the following does NOT require tickets? A. Bowers Museum. B. Sawdust Art Festival. C. Drive-In Movies at the Mall. D. The Virtual Orange County Children’s Book Festival. 2. What can visitors do on Sawdust Art Festival? A. Appreciate live music. B. See drive-in movies.

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湖北省黄冈市2020-2021学年高三上学期9月调研考试数学 试题 学校:___________姓名:___________班级:___________考号:___________ 一、单选题 1.已知集合2{|320},{|124}x A x x x B x =-+≤=<<,则A B =( ) A .{|12}x x ≤≤ B .{|12}x x <≤ C .{|12}x x ≤< D .{|02}x x ≤< 2.已知a b c d ,,, 都是常数,,a b c d <<.若()()()2020f x x a x b 的零点为,c d ,则下列不等式正确的是( ) A .a c d b <<< B .c a b d <<< C .a c b d <<< D .c d a b <<< 3.已知0.42x =,2lg 5y =,0.425z ??= ??? ,则下列结论正确的是( ) A .x y z << B .y z x << C .z y x << D .z x y << 4.若实数a ,b 满足14a b +=ab 的最小值为( ) A B .2 C . D .4 5.我国著名数学家华罗庚先生曾说:数缺形时少直观,形缺数时难入微,数形结合百般好,隔裂分家万事休. 在数学的学习和研究中,常用函数的图象来研究函数的性质,也常用函数的解析式来琢磨函数的图象的特征,如函数(1)e sin ()e 1 x x x f x =-+在区间ππ(-,)22 上的图象的大致形状是( ) A . B .

C . D . 6.已知向量(2,1)a =,(0,)b m ,(2,4)c =,且()a b c -⊥,则实数m 的值为( ) A .4 B .3 C .2 D .1 7.已知抛物线2:4C y x =的焦点为F ,准线为l ,P 是l 上一点,Q 是直线PF 与抛物线C 的一个交点,若4PF FQ =,则QF =( ) A .3 B .52 C .32 D .32或52 8.明代朱载堉创造了音乐学上极为重要的“等程律”.在创造律制的过程中,他不仅给出了求解三项等比数列的等比中项的方法,还给出了求解四项等比数列的中间两项的方 法.比如,若已知黄钟、大吕、太簇、夹钟四个音律值成等比数列,则有大吕 大吕太簇据此,可得正项等比数列{}n a 中,k a =( ) A .n - B .n - C . D . 二、多选题 9.下列有关命题的说法正确的是( ) A .(0,π)x ?∈,使得2sin sin x x += B .命题:P x R ?∈,都有cos 1≤x ,则0:P x R ??∈,使得0cos 1x > C .函数()f x =()g x = D .若x 、y 、z 均为正实数,且3412x y z ==,(,1),()x y n n n N z +∈+∈,则4n = 10.已知曲线C 的方程为22 1()26x y k R k k +=∈--,则下列结论正确的是( ) A .当4k =时,曲线C 为圆 B .当0k =时,曲线 C 为双曲线,其渐近线方程为y = C .“4k >”是“曲线C 为焦点在x 轴上的椭圆”的充分而不必要条件

湖北省黄冈市2020-2021学年高三上学期9月调研考试数学试题

湖北省黄冈市2020-2021学年高三上学期9月调研 考试数学试题 学校_________ 班级__________ 姓名__________ 学号__________ 一、单选题 1. 已知集合,则()A.B. C.D. 2. 已知都是常数,.若的零点为 ,则下列不等式正确的是() A.B. C.D. 3. 已知,,,则下列结论正确的是() A.B. C.D. 4. 若实数,满足,则的最小值为()A.B.C.D. 5. 我国著名数学家华罗庚先生曾说:数缺形时少直观,形缺数时难入微,数形结合百般好,隔裂分家万事休. 在数学的学习和研究中,常用函数的图象来研究函数的性质,也常用函数的解析式来琢磨函数的图象的特征,如函数 在区间上的图象的大致形状是() A.B.

C.D. 6. 已知向量,,,且,则实数的值为() A.B.C.D. 7. 已知抛物线的焦点为,准线为,是上一点,是直线 与抛物线的一个交点,若,则() A. B.C.D.或 8. 明代朱载堉创造了音乐学上极为重要的“等程律”.在创造律制的过程中,他不仅给出了求解三项等比数列的等比中项的方法,还给出了求解四项等比数列的中间两项的方法.比如,若已知黄钟、大吕、太簇、夹钟四个音律值成等比数列,则有,,.据此,可得正项等比数列中,() A.B.C.D. 二、多选题 9. 下列有关命题的说法正确的是() A.,使得成立 B.命题,都有,则,使得 C.函数与函数是同一个函数 D.若、、均为正实数,且,,则

10. 已知曲线的方程为,则下列结论正确的是 () A.当时,曲线为圆 B.当时,曲线为双曲线,其渐近线方程为 C.“”是“曲线为焦点在轴上的椭圆”的充分而不必要条件 D.存在实数使得曲线为双曲线,其离心率为 11. 已知函数则下列说法正确的是()A.的值域是 B.是以为最小正周期的周期函数 C.在区间上单调递增 D.在上有个零点 12. 一副三角板由一块有一个内角为的直角三角形和一块等腰直角三角形组成,如图所示,,现将两块三角形板拼接在一起,得三棱锥,取中点与中点,则下列判断中正确的是() A.直线面 B.与面所成的角为定值 C.设面面,则有∥ D.三棱锥体积为定值. 三、填空题 13. 设函数,若,则实数m的取值范围是______.

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