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题目列表(包括答案和解析)

为探究植物细胞膜的透性,某同学以红甜菜根(液泡中含有花青素)进行下列实验:
A.将不同切片放在不同温度的蒸馏水中处理1分钟后取出。
B.再分别放在清水中浸泡1小时而获得不同的切片浸出液。
C.测量这些溶液的花青素吸光度,得结果如下图。

请回答以下问题:
(1)上述实验操作步骤的叙述存在着一个明显的不足,没有遵循实验设计的    原则。请你对上述实验中的不准确的操作重新进行叙述:            
(2)由上图中的曲线你可以得出的结论是                    
(3)已知物质A能促进细胞膜上载体的活性。有人认为:经过不同温度的处理是影响了细胞膜上运载花青素的载体的活性。请你借助上述材料设计实验证明该观点是否正确。
材料用具:略。
实验步骤:
                                                                   
                                                                  
                                                                   
(2)预测结果及结论:
                                                                   
                                                                   

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Olympic torch around the world

  The Beijing 2008 Olympic Torch Relay(火炬接力) traveled the longest distance,covered the greatest area and included the largest number of people.On March 25,Olympic Flame(火种) litted(点燃) in Greece.

  Route Distance:137,000 km

  Time:130 days

  Route:March 31,Torch Relay started in Beijing→...London→Paris→San Francisco...→Hongkong...→Beijing.

  Torch Length:72cm.

  Torch Weight:985 grams

  Design:It was based in the shape of a paper scroll(卷) with lucky clouds on it.It stayed lighted(点燃) in bad weather conditions.

  阅读上文判断正误,正确写(T),错误(F)

1.The Beijing 2008 Olympic Torch Relay traveled a longer distance than before.

2..It took more than five months to trvel around the world.

3.The Torch Relay started in the city of Beijing.

4.The torch is 985 cm Long and 72 grams heavy.

5.The torch looks like a paper scroll.Bad weather couldn't stop the torch from burning.

 

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Who designed (设计) the first helicopter (直升飞机)? Who __1__ of the most famous pictures in the world? Who knew more about the human body than most __2__? There is an answer __3__ all these  questions --- Leonardo de Vinci (达芬奇).
  Leonardo may have been the greatest genius (天才) __4__ have ever known. He lived in Italy around the year 1500, but many of his inventions seem modern to us today. For example, one of his notebooks has drawings of a helicopter. Of course, he couldn’t __5__ a helicopter with the things he had. But scientists say his idea would have worked.
  But Leonardo __6__ an inventor. He was one of the greatest artists of his day. By the time he was twenty years old, he was called a master ( 大师) painter, and as he got older he became __7__ more famous. Sometimes he drew a hand ten different ways __8__ he was ready to paint.
  Many of Leonardo’s wonderful paintings are still with __9__ today. You may know one of his most famous works the __10__ woman known as the Mona Lisa.

  1. A. took                     B. made         C. painted              D. invented
  2. A. artists            B. doctors     C. painters            D. people
  3. A. to                 B. of             C. for            D. from
  4. A. the scientists  B. the artists   C. the world          D. people
  5. A. draw            B. paint        C. work                 D. build
  6. A. was just         B. wasn’t just  C. wasn’t               D. was no longer
  7. A. less              B. no             C. even                 D. very
  8. A. before          B. after          C. because            D. when
  9. A. him               B. us              C. them                 D. you
  10. A. interesting    B. crying        C. smiling             D. surprising

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Whenever we think of Hollywood, we think of movies and famous movie stars. They are part of Hollywood’s history. Today people make movies in other places, too. Not all famous movie stars live in Hollywood. But Hollywood is still a very special city in Los Angeles, California.

  You can easily see where Hollywood is in Los Angeles. There is a big sign on the hills. The sign says “HOLLYWOOD”. The white letters are fifty feet tall. You can see the sign from far away. The Hollywood sign is a famous landmark in Los Angeles. Many postcards show this famous Hollywood landmark.

  In the hills of Hollywood, there is also an open-air theater called “the Hollywood Bowl”. It is one of the largest open-air theaters in the world. It has seventeen thousand seats and a very special stage(舞台). The design of the stage was made by an American architect(建筑师) named Frank Lloyd Wright. You can listen to all kinds of concerts at the Hollywood Bowl.

(  )41. Today Hollywood is________.

   A. still a special city in Los Angeles   B. a place where all the movie stars live

   C. a place where all the world’s movies are made  D. the biggest city in California

(  )42. You can see where Hollywood is in Los Angeles because________.

   A. it is a hill                 B. postcards show you

   C. there is a big sign on the hills  D. local people will tell you

(  )43. The Hollywood Bowl is         .

     A. a place where you can see movies

     B. one of the largest open-air theaters in the world

    C. a hill in Hollywood     

     D. a landmark in Los Angeles

(  )44. Which of the following is not mentioned (提及)about the Hollywood Bowl?

   A. Seats.   B. Size.   C. Stage.   D. Designer.

(  )45. What special things can we see in Hollywood?

   A. The Hollywood hills.   B. The Hollywood landmark.

   C. The Hollywood Bowl.   D. Both B and C

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阅读图表,从每题中所给的ABC三个选项中选出最佳答案。

National Day’s Activities Programme

Time and place

October 1-7 at Wanshi Hotel

Classroom Area

English taster lessons

Food health-keeping method speeches

E-Photography and Techno-Music

Computer Area

How to find useful information on the web

How to design an easy web page

Lecture Area

Learning English will invite experts from English-speaking countries to hold lectures from 18:30 to 20:30 on October 1 to 6 and in the daytime on October 7.

Charity Area

Collect money for poor children.

Bring your old things and sell them!

Come on and buy some things!

( ) 51. These activities will stop on ________.

  A. September 31   B. October 1      C. October 7   

( ) 52. You can’t have ________ lessons in the Classroom Area.

  A. history    B. English taster   C. e-photography    

( ) 53. In the Computer Area, you can ________.

  A. learn to send emails  B. learn to design a web page  C. buy a cheaper computer     

( ) 54. You may have a chance to learn English at ________.

A. 9:00—9:45 am, Oct. 1  B. 10:30—18:30, Oct. 3  C. 19:15—20:00, Oct. 5          

( ) 55. Mr. Chen is a kind-hearted man. If he wants to help poor children, where should he go?

  A. The Classroom Area.  B. The Computer Area.   C. The Charity Area.

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