look up 查阅.仰望 M 查看更多

 

题目列表(包括答案和解析)

When you look up into the sky at night, have you ever felt that your eyes are playing tricks on (捉弄) you? It seems that the stars are moving all the time.
Actually, there is nothing wrong with your eyes. This twinkling effect is called scintillation (交光). Scintillation happens because of air movements in the earth’s atmosphere (大气). Light is “bent (弯曲的)” when it travels through different parts of the earth’s atmosphere. As the air in the earth’s atmosphere is moving all the time, the light from the stars looks as if it is moving too.
The same thing also happens to things on the ground. On a very hot and shiny day, if you look at the road, the image in the distance is not clear and things move slightly. You can also see the same effect if you drop a rock into water. The rock appears a little unclear under the moving water.
This twinkling effect causes a lot of problems for astronomers (天文学家) since they cannot observe the stars clearly. A telescope (望远镜) was sent into space so that the air movements in the atmosphere could be avoided (避免). It took a long time to build the space telescope but finally in 1990, a huge space telescope called the Hubble Space Telescope was successfully sent into space. Since then, astronomers have many important observations that have helped people understand space better.
根据短文内容,选择最佳选项。 (10分)
【小题1】What happens to the light from the stars we see when the air in the earth’s atmosphere is moving?

A.It looks even brighter.
B.It looks as if it is bent.
C.It looks as if it is moving.
D.It looks like drops of rain.
【小题2】Scintillation also happens on      according to the passage.
A.rainy daysB.shiny days
C.cloudy daysD.windy days
【小题3】What can you see when you drop a rock into the water?
A.The rock gets broken.
B.The rock becomes unclear.
C.The water becomes much polluted.
D.The water does not move anymore.
【小题4】The underlined word “observe” means “    ”.
A.watchB.listenC.drawD.explain
【小题5】Why is scintillation a problem for astronomers?
A.The stars never stay still.
B.It makes the stars too dark to see.
C.It makes astronomers feel too hot to work.
D.Astronomers cannot observe the stars clearly.

查看答案和解析>>

What do we do when we go camping? First, we think of a plan. We take food, clothes, a knife, and things for cooking and eating. We take things to keep us away from insects and the sun. Then we put everything into the car and we drive to the woods. We look for a place for campers (露营者) and we look for a good place for our tent(帐篷). The place should have a lot of air. This will keep some insects (虫子) away. High land with water on both sides of it is good. Then we put up our tent. We put everything into the tent, and we are ready for fun. We can swim in the lake, walk in the woods, climb a mountain, row a boat, or go fishing. In the evening we come back to the tent, we build a big fire because it can keep the insects away. We sit around the fire and talk. We may tell interesting stories or we may sing songs. At night we lie down on the grass. We can look up at the stars. It is a busy day, so we try to go to sleep early. Everything is dark. Everything is quiet. We hope we won’t hear music from the radio in the next tent. We hope it won’t rain.
【小题1】 Before going to camp we should first ___________.

A.think of a plan
B.take some food
C.take things to keep us warm
D.take something for cooking and eating
【小题2】 We go to camp __________.
A.by busB.by carC.by bikeD.on foot
【小题3】 Campers can join in ________ activities.
A.one or twoB.only a fewC.manyD.two or three
【小题4】 In the evening we build a fire because ________.
A.it is cold at nightB.it can keep us warm
C.it can keep the insects awayD.it is dark and quiet
【小题5】 The campers like to ____ at night.
A.hear music from the radio B.go to sleep early
C.have rainD.be busy

查看答案和解析>>

 I  bought  a pet  yesterday , but I  don’t know how to ______it.

A.  look  for  B. look after  C. look   up  D.  look  out

 

查看答案和解析>>

Every morning, the newspaper chief editor(主编) holds a meeting with the reporters. They discuss the main events(事件) of the day. Reporters are then sent to cover the events.  

As soon as the reporters know what to write about, they get down to work. They telephone people and fix a time for a face-to-face interview with them. Sometimes they do telephone interviews. Checking information is very important. They go to the newspaper's own library to look up any information that they need. This is called “doing one's homework”.

At the same time, the picture editor decides which photographs will be used for the next day's paper. All the people who work on a newspaper must be able to work fast. Reporters have to stop working on one story and start working at once on the important new one. They must find out the new information as quickly as possible. Later in the day, everything is put together at the news desk. Reporters return, type their stories into the computer and hand them to the editor.  

The chief editor decides which will be the most important story on the front page. Sometimes this will have to be changed if something more important happens late in the day. Other editors read the stories which the reporters have written and make any necessary changes.  

Finally, there is no more time left for adding new stories, and the time for printing(印刷) the newspaper has come. This is done on fast-moving printing machines. The newspapers are then delivered(发送) by truck, plane or rail. Speed is important. People want to buy the latest newspaper; nobody wants to buy yesterday's.  

1.What is the work in a newspaper office like? 

A. Interesting and confusing B. Important and patient.  

C. Particular and necessary. D. Fast and busy.

2.According to the passage, the right order for a reporter's work is ____________.  

a. writing stories         b. doing interviews  c. joining in a discussion   

d. doing homework       e. handing stories to the editor

A. c-b-a-d-e     B. c-d-e-a-b     C. c-b-d-a-e     D. c-a-d-b-e

3.The front page contents(内容) are decided by ___________.

A. the importance of the events

B. how well the stories are written  

C. the knowledge of the chief editor

D. whether they are the latest  

4.Word editors' work is to ____________.

A. help the chief editor with the morning discussion  

B. decide when and how the papers can be printed  

C. read the stories and make necessary changes  

D. get together information from reporters and photographers

5.The best title for this passage is “____________”。  

A. How a newspaper is produced     B. How newspapers are delivered  

C. What kind of papers readers like   D. Whose work is more important

 

查看答案和解析>>

One day Jack met his good friend Sue in the park. A dog was looking up at the woman beside her.
   Jack walked up to Sue and said, “Hello, how are you? May I sit and talk with you for a moment?” “Of course, please sit down,” Sue said. Jack sat down next to Sue on the bench, and they talked quietly together. The dog continued to look up at Sue, as if( 似乎) waiting to be given some food.
  “That's a nice dog, isn't he?” Jack said, pointing at the animal.
  “Yes, he is. He's handsome. He's strong and healthy.”
“And hungry,” Jack said. “He hasn't taken his eyes off you. He thinks you've got some food for him.”
  “That's true,” Sue said. “But I haven't.”
  They both laughed and then Jack said, “Does your dog bite(咬)?”
  “No, ”Sue said, “ He's never bitten anyone. He's always gentle and friendly.”
  Hearing this, Jack decided to hold out his hand and touched the animal's head. Suddenly it jumped up and bit him.
  “Hey!” Jack shouted. “You said your dog didn't bite.”
  Sue answered in surprise, “Yeah, I did. But this is not my dog. My dog is at home.”
【小题1】Jack and Sue were ________.

A.friendsB.neighbors
C.classmatesD.brother and sister
【小题2】The dog looked at the woman because _______.
A.the woman wanted to feed himB.the woman was friendly
C.he was strong and healthyD.he was hungry
【小题3】Jack touched the dog because he believed _______.
A.the dog was handsomeB.Sue's dog was unfriendly
C.the dog belonged to SueD.Sue's dog was at home
【小题4】We can guess from the story that _______.
A.Sue gave a wrong answerB.Jack made a mistake(错误)
C.the dog wasn’t dangerousD.both Jack and Sue liked the dog
【小题5】Which of the Following can be the best title of the passage?
A.A Wrong Question B.Sue's Dog
C.A pleasant talk D.Sue's Friend

查看答案和解析>>


同步练习册答案