【題目】兩個完全相同的條形磁鐵，放在平板AB上，磁鐵的N、S極如圖所示，開始時平板及磁鐵皆處于水平位置，且靜止不動。
a．現(xiàn)將AB突然豎直向上平移（平板與磁鐵之間始終接觸），并使之停在A″B″處，結(jié)果發(fā)現(xiàn)兩個條形磁鐵吸在了一起。
b．如果將AB從原來位置突然豎直向下平移，并使之停在位置A′B′處，結(jié)果發(fā)現(xiàn)兩條形磁鐵也吸在了一起，請回答下列問題：
（1）開始時兩磁鐵靜止不動，磁鐵間的相互作用力是________力；右側(cè)的磁鐵受到的靜摩擦力的方向向________。
（2）在a過程中磁鐵開始滑動時，平板正在向上加速還是減速呢？答：________。
（3）在b過程中磁鐵開始滑動時，平板正在向下加速還是減速呢？答：________。
星級口算天天練系列答案科目：高中地理 來源： 題型：
【題目】III. 短文改錯
假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文。文中共有10處語言錯誤，每句中最多有兩處，每處錯誤僅涉及一個單詞的增加、刪除或修改。
增加：在缺詞處加一個漏字符號(∧)，并在其下面寫出該加的詞。
刪除：把多余的詞用斜線(＼)劃掉。
修改：在錯的詞下劃一橫線，并在該詞下面寫出修改后的詞。
注意：
1.每處錯誤及其修改均限一詞；
2.只允許修改10處，多者(從第11處起)不計分。
I am travelling back with my parents from seeing my grandparents then it started to snow. At first, I thought it was fun and everything looked beautifully. I was looking forward to make a snowman in the playground at school the next day, and suddenly the car drove off road and into a channel. My father called the rescue team, but they said that would be a long time before they could reach us. However, we sang songs and told stories to pass the time. Several hour later, the rescue team pulled their car out of the channel. At last, we managed to drive very slowly to home. I would never forget this experience.
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】選詞填空
用下列詞組的適當形式完成下列句子。
fast asleep vary from … to… take sb. by surprise freeze over
draw up give birth to make one’s way take notice
have a gift for burn to the ground
1. The air temperature was well below freezing, and lakes and rivers __________.
2. Having spent the whole morning climbing Mount. Tai, the family were very tired and slowly ____________ to
the hotel.
3. He was lying ____________ on the sofa; it would be cruel to wake him.
4. His heart attack was so sudden that I think even the doctors were ____________.
5. The story The Pity of Zhongyong concerns a boy who _______________ writing poetry in his childhood.
6. The outbreak of H7N9 bird flu has really made the government sit up and ___________.
7. The film If You Are the One ______________ a TV show of the same name.
8. After a heated discussion, they __________ a plan to advertise their new product nationwide.
9. The bus was ___________, and at least 30 people burnt to death.
10. The land of Changbaishan ______ in height ____ 700 metres above sea level __ over 2,000 metres.
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】A
The first ancient Olympic Games for which we still have written records were held in 776 BC. Coroebus won the only event at the Olympics. This made him the very first Olympic champion in history. Then they grew and continued to be played every four years. In 393 AD, the Roman emperor Theodosius Ⅰ, a Christian, announced to end the Games because of their pagan (異教的) influences.
About 1,500 years later, a young Frenchman named Pierre de Coubertin began their revival (恢復). In 1892 Coubertin first brought forward his idea to revive the Olympic Games but failed.
Two years later, Coubertin organized a meeting with 79 delegates (代表) who represented nine countries. At this meeting he got what he wanted. All the delegates at the conference voted for the Olympic Games. They also decided to have Coubertin set up an international committee to organize the Games. This committee became the International Olympic Committee (IOC) and Demetrious Vikelas from Greece was selected to be its first president. Athens was chosen for the revival of the Olympic Games and the planning was begun.
The very first modern Olympic Games opened in the first week of April, 1896. Since the Greek government had been unable to afford a stadium, a rich Greek architect, Georgios Averoff, donated one million drachmas (over $100,000) to repair the Panathenaic Stadium, originally built in 330 BC.
Since the Games were not well publicized internationally, contestants (選手) were not nationally chosen but rather came individually and at their own expense. Some contestants were tourists who happened to be in the area during the Games.
【1】What would be the best title for the passage?
A. The History of the Olympics
B. How Coubertin Set up IOC
C. The First Modern Olympic Games
D. Great Changes in the Olympic Games
【2】 Coubertin held a most important meeting with 79 delegates in______________.
A. 1500 B. 1892
C. 1894 D. 1896
【3】 Who offered money to help the first modern Olympic Games?
A. Demetrious Vikelas.
B. Coroebus.
C. Pierre de Coubertin.
D. Georgios Averoff.
【4】At the first modern Olympic Games, ______________.
A. winners were given money as prize
B. IOC invited contestants to tour Greece
C. there were no strict rules for being a contestant
D. many countries chose some athletes to compete
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】A
In 1995, Oseola McCarty gave a present of $ 150,000 to the University of Southern Mississippi. She wanted to help poor students. It was a very generous thing to do. But her friends and neighbors were surprised. McCarty was a good woman. She went to church. She was always friendly and helpful. But everyone in her town knew that McCarty was not rich. In fact, she was poor.
How did a poor 86-year-old woman have so much money? Oseola McCarty was born in 1908 in Hattiesburg, Mississippi. She had to leave school when she was eight years old to help her family. She took a job washing clothes. She earned only a few dollars a day. Oseola washed the clothes by hand. Then she hung the clothes to dry. She did this for nearly 80 years. In the 1960s’ she bought an automatic washer and dryer. But she gave them away. She did not think they got the clothes clean enough! At that time, many people started to buy their own washers and dryers. McCarty did not have much work, so she started to iron clothes instead.
McCarty never married or had children. Her life was very simple. She went to work and to church. She read her Bible. She had a black-and-white television. But she did not watch it very much. It had only one channel.
McCarty saved money all her life and eventually had about $250,000.When she was 86, a lawyer helped her make a will. She left money to the church, her relatives, and the university. McCarty just wanted to help others. She did not think she was a special person. But then people found out about her present to the university. She received many honors(榮譽). She even flew in an airplane for the first time! Oseola McCarty died in 1999.She was a shy and ordinary woman who became famous.
【1】Oseola McCarty gave $150,000 to the University of Southern Mississippi __________.
A. to help the poor students
B. to surprise her friends and neighbors
C. to show her generosity
D. to be a good and rich woman
【2】From the story we know ___________.
A. McCarty was born in a poor family near the University of Southern Mississippi
B. everyone was surprised because they thought McCarty had no education
C. washers and dryers brought a change in McCarty’s life
D. McCarty gave half of her money to the church and her relatives.
【3】 Which of the following is true?
A. McCarty had to work to help her family after school every day.
B. McCarty learned to read the Bible by herself in the school.
C. McCarty made one third of her money by washing and ironing clothes.
D. McCarty did not have her own family because she had no husband or children.
【4】 From which of the following can we tell McCarty lived a simple life?
A. She worked hard all her life.
B. She didn’t think she was special.
C. She didn’t have many interests.
D. She had a TV set with many channels.
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】如圖所示是一種利用電磁原理制作的充氣泵的結(jié)構(gòu)示意圖。其工作原理類似于打點計時器，當電磁鐵通入電流時，可吸引或排斥上部的小磁鐵，從而帶動彈性金屬片對橡皮碗下面的氣室施加力的作用，達到對外充氣的效果。請回答以下問題：
（1）當電流從電磁鐵的接線柱a流入時，發(fā)現(xiàn)吸引小磁鐵向下運動，則電磁鐵的上端為________極，小磁鐵的下端為________極。
（2）你認為這種充氣泵是利用直流電好，還是利用交流電好？答案：________
（3）纏繞電磁鐵用的鐵芯可分為硬磁性材料和軟磁性材料。硬磁性材料在磁場撤去后還會有很強的磁性，而軟磁性材料在磁場撤去后就沒有明顯的磁性了。你認為這種鐵芯最好用________材料制作。
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】短文改錯
假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文。文中共有10處語言錯誤，每句中最多有兩處。錯誤涉及一個單詞的增加、刪除或修改。
增加：在缺詞處加一個漏詞符號（∧），并在其下面寫出該加的詞。
刪除：把多余的詞用斜線（\）劃掉。
修改：在錯的詞下劃一橫線，并在該詞下面寫出修改后的詞。
注意：
1. 每處錯誤及其修改均僅限一詞；
2. 只允許修改10處，多者（從第11處起）不計分。
It was the International Women’s Day. Li Hua had a good idea and tells his father that he was going to do everything to celebrate it. He asked his father to help him. First they decided to do some housework, that was always done by his mother. Li Hua cleaned the house completely while his father did some shop. Then they made a good meal, cooking fish, pork, chicken, soup but some other delicious dishes. Li Hua laid the table and set a vase full with flowers in the middle of the table. After that they hid them behind the door and waited the mother in order to give her a surprise. When his mother came back and saw the delicious food, she felt happily.
查看答案和解析>>
科目：高中地理 來源： 題型：
【題目】化學興趣小組為探究SO2的性質(zhì)，按下圖所示裝置進行實驗。(已知：Na2SO3+H2SO4===Na2SO4+SO2↑+H2O)
請回答下列問題：
(1)裝置A中盛放濃硫酸和亞硫酸鈉的儀器名稱分別是________、________。
(2)反應后，裝置B中發(fā)生的現(xiàn)象是_________________________________；反應的離子方程式為______________________________；裝置C中的現(xiàn)象是___________________________，表現(xiàn)了SO2的________；裝置D中現(xiàn)象是_____________________________________________，發(fā)生反應的化學方程式為_________________________________________。
(3)裝置E的目的是探究SO2與品紅作用的可逆性，請寫出實驗操作及現(xiàn)象_________________________。
(4)F裝置的作用是________________________，漏斗的作用是___________________________。
查看答案和解析>>
湖北省互聯(lián)網(wǎng)違法和不良信息舉報平臺 | 網(wǎng)上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權(quán)舉報專區(qū)
違法和不良信息舉報電話：027-86699610 舉報郵箱：58377363@163.com
