精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区

A. B. C.或 D. 或 查看更多

 

題目列表(包括答案和解析)

關(guān)于力的說法中正確的是(   )

A.力可以離開施力物體或受力物體而獨(dú)立存在 B.對(duì)于力只需要說明其大小,而無需說明其方向

C.一個(gè)施力物體只能有一個(gè)受力物體         D.一個(gè)受力物體可以有幾個(gè)施力物體

查看答案和解析>>

請(qǐng)閱讀以下相關(guān)的職業(yè)或興趣愛好:

A.The person works in a hospital emergency room. His/her job is to assist doctors to rescue patients who are seriously ill.
B.The person likes sports activities the most. For him/her, having sports activities is very interesting.
C.The person works for himself/herself at home. He/She writes for others.
D.The person doesn’t like other things such as gardening. But he/she really likes music, especially classical music.
E.     The person likes collecting all kinds of things, such as baseball cards and stamps.
F.     Many people may like collecting things, such as collecting cards or stamps. But he/she likes reading very much.
請(qǐng)閱讀以下個(gè)人信息,然后匹配與他們相關(guān)的職業(yè)或興趣愛好:
1. Mary: I never used to like stamp collecting. I read almost everything I can: books, magazines, newspapers. I go to the public library about twice a week. If you’d like to send me something, maybe books are my favorite.
2. Tom: My wife says I should take up gardening. We have a big garden and she loves working in it. But the truth is, it bores me. My friends and my wife think I’m really boring, because I’m always listening to music. I go to concerts all the time. I love Mozart and all that classical staff.
3. Mike: I don’t really like video games and that sort of things. I prefer being outdoors, hiking or playing sports. I always go out with my family playing baseball and stuff all the time. I think most sports are pretty interesting.
4. Lisa: I’m a free writer, and a lot of people think my job is easier because I don’t have to go to the office every day. And I don’t have to deal with office politics. But, you know, my job is very hard. I have to be very organized and much disciplined. And pretty self-motivated. And when I have a problem, there is no one around to help me.
5. Victor: My life is very stressful. In my working place, everyone is in a hurry and under tremendous pressure. The doctors are demanding, and there is always too much to do to save a dying patient.

查看答案和解析>>

請(qǐng)閱讀以下相關(guān)的職業(yè)或興趣愛好:

A.The person works in a hospital emergency room. His/her job is to assist doctors to rescue patients who are seriously ill.

B.The person likes sports activities the most. For him/her, having sports activities is very interesting.

C.The person works for himself/herself at home. He/She writes for others.

D.The person doesn’t like other things such as gardening. But he/she really likes music, especially classical music.

E.     The person likes collecting all kinds of things, such as baseball cards and stamps.

F.     Many people may like collecting things, such as collecting cards or stamps. But he/she likes reading very much.

請(qǐng)閱讀以下個(gè)人信息,然后匹配與他們相關(guān)的職業(yè)或興趣愛好:

1. Mary: I never used to like stamp collecting. I read almost everything I can: books, magazines, newspapers. I go to the public library about twice a week. If you’d like to send me something, maybe books are my favorite.

2. Tom: My wife says I should take up gardening. We have a big garden and she loves working in it. But the truth is, it bores me. My friends and my wife think I’m really boring, because I’m always listening to music. I go to concerts all the time. I love Mozart and all that classical staff.

3. Mike: I don’t really like video games and that sort of things. I prefer being outdoors, hiking or playing sports. I always go out with my family playing baseball and stuff all the time. I think most sports are pretty interesting.

4. Lisa: I’m a free writer, and a lot of people think my job is easier because I don’t have to go to the office every day. And I don’t have to deal with office politics. But, you know, my job is very hard. I have to be very organized and much disciplined. And pretty self-motivated. And when I have a problem, there is no one around to help me.

5. Victor: My life is very stressful. In my working place, everyone is in a hurry and under tremendous pressure. The doctors are demanding, and there is always too much to do to save a dying patient.

 

查看答案和解析>>

下面一篇文章,請(qǐng)將標(biāo)有A~G的句子或段落插入文章中標(biāo)號(hào)1~5的合適位置,使這篇文章意義完整,結(jié)構(gòu)連貫;其中有兩個(gè)選項(xiàng)是多余的。

  Soccer is played by millions of people all over the world, but there have only been a few players who were really great.[1]________

  Firstly, these players came from places that have had famous stars in the past-the players that a young boy can look up to and try to imitate.[2]________ There has never been a great national team, or a really great player, from North America or from Asia.

  [3]________

  Finally, many great players came from the same kind of neighborhood(地方), a poor, crowded area where a boy’s dream is not to become a doctor, lawyer, or businessman, but to become a rich, famous athlete or entertainer(演員).[4]________.And George Best learned the tricks that made him famous by bouncing(使球跳)the ball off a wall in the slums(貧民窟)of Belfast.

  All great players have a lot in common, but that doesn’t explain why they are great.Hundreds of boys played in those Brazilian streets, but only one became Pele.[5]________

A.For example, Liverpool, which produced the Beatles, had one of the best English soccer teams in recent years.Pele practiced in the street with a “ball” made of rags(破布).

B.Secondly, all these players have had years of practice in this game.Alfredo Di Stefano was the son of a soccer player, as was Pele.Most players begin playing the game at the age of three or four.

C.How did these players get that way, was it through training and practice, or were great players “born, not made”?

D.Those players all had very hard, or rather painful time practicing in an unknown team, even alone.

E.The greatest players are born with unique(獨(dú)一無二的)quality that sets them apart from all the others.

F.In the history of soccer, only six countries have ever won the World Cup, three from South America and three from Western Europe.

G.There have been several countries from North America and Europe, which have ever won the World Cup.

查看答案和解析>>

閱讀下面短文,從每題所給的四個(gè)選項(xiàng)(A、B、C和D)中,選出最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑.

  Sam Higgins was a famous photographer, He traveled all over the world, taking photo-graphs for magazines and newspapers. His photographs won many prizes and he earned a lot of money.

  “I'll do anything to get a good photograph.” he often said. “I'll go anywhere at any time, even if it is dangerous.”

  And he spoke the truth. He had photographs of earthquakes, forest fires, floods, even wars. If something interesting happened, Sam went to photograph it.

  He was a married man and his wife often asked him to take her with him, but he always refused.

  “I travel for my work, not for pleasure, ”he told her. “You won't enjoy yourself, and I won't have time to look after you. Sometimes there's not even anywhere to stay and I have to sleep outside. I often don't have a good meal or a bath for days. You won't like it.”

  “Sam, I'm not a child, ”his wife argued. “I can look after myself. Please, take me with you next time you go abroad.”

  Sam did not say anything but he thought about it, and when he was asked to Africa he said. “You can come to Africa with me if you want to. I'll go to take photographs of the wildlife(野生動(dòng)物)there. It should be interesting and not too uncomfortable. We'll be staying with a ranger(森林或公園管理員).”

  His wife was very excited, and at first she had a very enjoyable time.

  Then Sam went off to find some lions to photograph. His wife went with him, but before long they became separated. They came to a fork(岔口)in the path, and she walked down one path while he walked down the other.

  Then Sam heard her screaming(尖叫). He ran back to the fork in the path and saw her running toward him. A huge lion was chasing(追趕)her.

  Quickly Sam took his camera out of its case(盒子)and pointed it at his wife and the lion.

  Then he shouted, “Slow down, woman. I can't get you both in the picture.”

1.Sam Higgins ________.

[  ]

A.enjoyed traveling

B.was a professional photographer

C.a(chǎn)ppeared in many magazines

D.took only dangerous photos

2.When Sam Higgins traveled all over the world, ________

[  ]

A.he went with his wife
B.he didn't have a bath
C.he slept outdoors
D.he lived a hard life

3.Mrs. Higgins wanted ________.

[  ]

A.to have her photograph taken
B.to stay with a ranger
C.to go with her husband
D.to have a child

4.What did Mrs. Higgins find?

[  ]

A.A lion.
B.A fork.
C.A camera.
D.A camera case.

查看答案和解析>>

1.解析:,故選A。

2.解析:抽取回族學(xué)生人數(shù)是,故選B。

3.解析:由,得,此時(shí),所以,,故選C。

4.解析:∵,∴,∴,故選C。

5.解析:設(shè)公差為,由題意得,,解得,故選C。

6.解析:∵雙曲線的右焦點(diǎn)到一條漸近線的距離等于焦距的,∴,又∵,∴,∴雙曲線的漸近線方程是,故選D.

7.解析:∵、為正實(shí)數(shù),∴,∴;由均值不等式得恒成立,,故②不恒成立,又因?yàn)楹瘮?shù)是增函數(shù),∴,故恒成立的不等式是①③④。故選C.

8.解析:∵,∴在區(qū)間上恒成立,即在區(qū)間上恒成立,∴,故選D。

9.解析:∵

,∴此函數(shù)的最小正周期是,故選C。

10.解析:如圖,∵正三角形的邊長(zhǎng)為,∴,∴,又∵,∴,故選D。

11.解析:∵在區(qū)間上是增函數(shù)且,∴其反函數(shù)在區(qū)間上是增函數(shù),∴,故選A

12.解析:如圖,①當(dāng)時(shí),圓面被分成2塊,涂色方法有20種;②當(dāng)時(shí),圓面被分成3塊,涂色方法有60種;

③當(dāng)時(shí),圓面被分成4塊,涂色方法有120種,所以m的取值范圍是,故選A。

13.解析:將代入結(jié)果為,∴時(shí),表示直線右側(cè)區(qū)域,反之,若表示直線右側(cè)區(qū)域,則,∴是充分不必要條件。

學(xué)科網(wǎng)(Zxxk.Com)14.解析:∵,∴時(shí),,又時(shí),滿足上式,因此,

學(xué)科網(wǎng)(Zxxk.Com)15.解析:設(shè)正四面體的棱長(zhǎng)為,連,取的中點(diǎn),連,∵的中點(diǎn),∴,∴或其補(bǔ)角為所成角,∵,,∴,∴,又∵,∴,∴所成角的余弦值為。

學(xué)科網(wǎng)(Zxxk.Com)16.解析:∵,∴,∵點(diǎn)的準(zhǔn)線與軸的交點(diǎn),由向量的加法法則及拋物線的對(duì)稱性可知,點(diǎn)為拋物線上關(guān)于軸對(duì)稱的兩點(diǎn)且做出圖形如右圖,其中為點(diǎn)到準(zhǔn)線的距離,四邊形為菱形,∴,∴,∴,∴,∴,∴向量的夾角為。

17.(10分)解析:(Ⅰ)由正弦定理得,,,…2分

,,………4分

(Ⅱ)∵,,∴,∴,………………………6分

又∵,∴,∴,………………………8分

!10分

18.解析:(Ⅰ)∵,∴;……………………理3文4分

(Ⅱ)∵三科會(huì)考不合格的概率均為,∴學(xué)生甲不能拿到高中畢業(yè)證的概率;……………………理6文8分

(Ⅲ)∵每科得A,B的概率分別為,∴學(xué)生甲被評(píng)為三好學(xué)生的概率為!12分

19.(12分)解析:(Ⅰ)∵,∴

 ,,……………3分

(Ⅱ)∵,∴,

,

,∴數(shù)列自第2項(xiàng)起是公比為的等比數(shù)列,………………………6分

,………………………8分

(Ⅲ)∵,∴,………………10分

。………………………12分

20.解析:(Ⅰ)∵,∴,∵底面,∴,∴平面,∴,又∵平面,∴,∴平面,∴。………………………4分

(Ⅱ)∵平面,∴,,∴為二面角的平面角,………………………6分

,,∴,又∵平面,,∴,∴二面角的正切值的大小為。………………………8分

(Ⅲ)過點(diǎn),交于點(diǎn),∵平面,∴在平面內(nèi)的射影,∴與平面所成的角,………………………10分

學(xué)科網(wǎng)(Zxxk.Com),∴,又∵,∴與平面所成的角相等,∴與平面所成角的正切值為!12分

解法2:如圖建立空間直角坐標(biāo)系,(Ⅰ)∵,,∴點(diǎn)的坐標(biāo)分別是,,∴,設(shè),∵平面,∴,∴,取,∴,∴!4分

(Ⅱ)設(shè)二面角的大小為,∵平面的法向量是,平面的法向量是,∴,∴,∴二面角的正切值的大小為。………………………8分

(Ⅲ)設(shè)與平面所成角的大小為,∵平面的法向量是,,∴,∴,∴與平面所成角的正切值為。………………………12分

21.解析:(Ⅰ)設(shè)拋物線方程為,將代入方程得

所以拋物線方程為!2分

由題意知橢圓的焦點(diǎn)為、

設(shè)橢圓的方程為

∵過點(diǎn),∴,解得,,,

∴橢圓的方程為!5分

(Ⅱ)設(shè)的中點(diǎn)為,的方程為:,

為直徑的圓交兩點(diǎn),中點(diǎn)為

設(shè),則

  

………………………8分

………………………10分

當(dāng)時(shí),,,

此時(shí),直線的方程為。………………………12分

22.(12分)解析:(Ⅰ)∵是偶函數(shù),∴,

又∵,,………………………2分

得,

時(shí),;時(shí),;時(shí),;∴時(shí),函數(shù)

精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区
欧美精品免费视频| 5月丁香婷婷综合| 亚洲日本成人在线观看| 91美女蜜桃在线| 亚洲欧美区自拍先锋| 色呦呦一区二区三区| 一区二区三区加勒比av| 欧美亚一区二区| 午夜不卡av免费| 日韩欧美在线观看一区二区三区| 久久超级碰视频| 国产午夜久久久久| av亚洲精华国产精华| 亚洲美女偷拍久久| 91精品中文字幕一区二区三区| 美女www一区二区| 国产三区在线成人av| 99久久免费视频.com| 亚洲国产一区视频| 日韩欧美激情四射| 成人一区二区三区视频在线观看 | 日日骚欧美日韩| 欧美r级在线观看| 成人午夜在线播放| 一区二区三区中文免费| 制服.丝袜.亚洲.中文.综合| 九色综合国产一区二区三区| 国产亚洲精久久久久久| 色婷婷综合久色| 日韩福利视频导航| 欧美激情一区二区三区蜜桃视频 | 欧美成人伊人久久综合网| 国产成人8x视频一区二区 | 久久超碰97中文字幕| 国产精品福利av| 欧美一区三区二区| 丰满亚洲少妇av| 午夜久久电影网| 久久精品视频免费观看| 91成人网在线| 精品在线视频一区| 亚洲色图制服诱惑| 日韩一区二区中文字幕| 不卡在线观看av| 日韩精彩视频在线观看| 国产农村妇女毛片精品久久麻豆| 欧美日韩精品欧美日韩精品一| 九九精品一区二区| 亚洲精品福利视频网站| 精品三级av在线| 色综合天天视频在线观看| 美女视频免费一区| 亚洲理论在线观看| 久久亚洲欧美国产精品乐播| 在线精品视频一区二区三四| 韩日欧美一区二区三区| 一区二区三区美女视频| 久久网这里都是精品| 欧美视频一区二区三区在线观看| 国产精品一区免费在线观看| 亚洲国产精品久久人人爱| 国产日本欧美一区二区| 6080午夜不卡| 一本色道a无线码一区v| 国产在线国偷精品免费看| 亚洲国产精品久久久久婷婷884 | 精品久久久久一区二区国产| 日本韩国欧美三级| 国产精品一区二区在线播放| 天天色图综合网| 亚洲免费资源在线播放| 国产欧美一区二区三区鸳鸯浴| 在线成人免费视频| 91麻豆高清视频| 国产**成人网毛片九色 | 欧美激情一区三区| 亚洲精品一线二线三线无人区| 欧美日韩午夜影院| 91猫先生在线| 国产99精品在线观看| 久久国产尿小便嘘嘘尿| 丝袜亚洲另类欧美| 亚洲综合色婷婷| 成人欧美一区二区三区白人| 久久精品人人爽人人爽| 日韩三级视频中文字幕| 欧美日韩免费观看一区二区三区| 99精品视频在线观看| 国产99精品国产| 国产永久精品大片wwwapp| 免费在线观看精品| 亚洲h在线观看| 一区二区成人在线| 樱花影视一区二区| 综合婷婷亚洲小说| 国产精品乱码妇女bbbb| 国产丝袜欧美中文另类| 精品国产乱码久久久久久图片| 欧美手机在线视频| 欧美在线观看一二区| 91天堂素人约啪| 99re成人在线| eeuss影院一区二区三区| 懂色av一区二区夜夜嗨| 国产盗摄视频一区二区三区| 国内国产精品久久| 精品一区二区在线观看| 麻豆久久久久久| 蜜臀av性久久久久蜜臀aⅴ四虎 | 欧美日韩免费高清一区色橹橹| 日本韩国欧美在线| 欧美图区在线视频| 欧美日韩中文精品| 欧美日韩高清一区| 欧美久久久久中文字幕| 欧美精选一区二区| 欧美一级二级三级乱码| 日韩三级中文字幕| 2欧美一区二区三区在线观看视频| 精品国产91乱码一区二区三区| 精品福利一区二区三区免费视频| 欧美电视剧在线观看完整版| www亚洲一区| 国产日产欧美精品一区二区三区| 国产欧美日韩精品a在线观看| 国产农村妇女精品| 国产精品国产自产拍高清av| 亚洲视频在线观看一区| 洋洋成人永久网站入口| 亚洲成人免费影院| 免费日本视频一区| 狠狠色丁香久久婷婷综合丁香| 国产一区二区三区| a级高清视频欧美日韩| 91啪亚洲精品| 欧美日韩日日骚| 日韩欧美一级片| 久久嫩草精品久久久久| 国产精品日产欧美久久久久| 亚洲欧洲三级电影| 亚洲一区二区三区三| 麻豆视频一区二区| 国产馆精品极品| 97精品电影院| 欧美丝袜丝交足nylons图片| 日韩一区二区三区在线观看 | 亚洲电影一级片| 久久精品国产精品青草| 国产成人精品免费一区二区| 91视频观看免费| 欧美乱妇20p| 久久久精品天堂| 亚洲裸体在线观看| 日韩国产成人精品| 国产大陆亚洲精品国产| 色综合天天在线| 91精品国产综合久久久久久久| 国产亚洲欧美日韩日本| 亚洲精品亚洲人成人网| 青草国产精品久久久久久| 国产激情一区二区三区四区| 日本福利一区二区| 日韩欧美一区二区三区在线| 国产精品欧美久久久久一区二区| 亚洲一二三四区| 麻豆专区一区二区三区四区五区| 成人美女在线视频| 欧美日韩在线一区二区| 久久久一区二区三区捆绑**| 亚洲精品成人a在线观看| 美女性感视频久久| 99re6这里只有精品视频在线观看 99re8在线精品视频免费播放 | 韩国精品久久久| 一本色道久久综合亚洲精品按摩| 欧美一卡2卡三卡4卡5免费| 国产精品无人区| 免费高清不卡av| 99国产精品视频免费观看| 91精品欧美福利在线观看| 国产精品欧美综合在线| 免费成人在线网站| 99久久夜色精品国产网站| 日韩一区二区高清| 日韩毛片一二三区| 久久99久久精品欧美| 日本高清视频一区二区| 国产亚洲综合在线| 日日夜夜一区二区| 99久久久精品| 欧美精品一区二区三区在线播放| 亚洲精品视频在线观看免费 | 99免费精品在线| 精品伦理精品一区| 亚洲永久免费av| 国产91色综合久久免费分享| 制服丝袜亚洲播放| 亚洲视频免费在线观看| 国产一区二区三区在线观看免费视频| 日本道精品一区二区三区| 久久久久久久久伊人|