5.Which is true of satellites? A.A satellite usually works for about 10-12 years. B.Every time a satellite gets broken.it is brought back to the Earth to be repaired. C.A broken satellite is never left in space. D.They often crash into each other. 1-5 DCBCA (III) ★★★ Cancer researchers urged people on Wednesday to take more vitamin D to lower risk of cancer, saying studies showed a clear link. “Our suggestion is for people to increase their intake , through diet or a vitamin supplement, Dr. Cedric Garland said in a telephone interview. Garland's research team reviewed 63 studies, including several large long-term ones, on the relationship between vitamin D and certain types of cancer worldwide between 1966 and 2004. “There's nothing that has this ability to prevent cancer, he said, urging governments and public health officials to do more to fortify foods with vitamin D. Garland is part of a University of California at San Diego Moores Cancer Center team that published its findings this week online in the American Journal of Public Health. Vitamin D is found in milk, as well as in some fortified orange juice, yogurt and cheeses, usually at around 100 international units(IU)a serving. “People might want to consider a vitamin supplement to raise their intake to 1000 IUs per day Garland said, adding that it was well within the safety guidelines established by the National Academy of Sciences. The authors said that taking more vitamin D could be especially important for people living in northern areas, which receive less vitamin D from sunshine. “African Americans, who don't produce as much of the vitamin because of their skin colour, could also benefit significantly from a higher intake, the authors said. 查看更多

 

题目列表(包括答案和解析)

Satellites are an important part of our ordinary lives.For example, the information for weather forecasts is sent by satellite.Some satellites have cameras which take photographs of the Earth to show how clouds are moving.Satellites are also used to connect our international phone calls.

Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to US through satellites.Airplane pilots also sometimes use a satellite to help them find their exact location.

We use satellites to send television pictures from one part of the world to another.They are usually 35,880 kilometers above the equator.Sometimes we can see a satellite in the sky and it seems to stay in the same place.This is because it is moving around the world at 11,000 kilometers an hour—exactly the same speed that the earth rotates.A satellite must orbit the Earth with its antennae(天线)facing the earth.Sometimes, it moves away from its orbit,So there are little rockets on it which are used to put the satellite back in the right position.This usually happens about every five or six days.

Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth.A satellite usually works for about 10-12 years.Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired.Often,very old or broken satellites are left in space to orbit the Earth for a very long time.This is very serious because some satellites use nuclear power and they can crash into each other.

Which of the following is NOT done by satellites according to the passage?

A.Sending information for weather forecast.

B.Taking photographs of the Earth.

C.Sending TV pictures.

D.Providing food for airplane pilots.

What’s the speed the earth rotates at?

A.35,880 kilometers per hour.     B.335,880 kilometers per hour.

C.11,000 kilometers per hour.     D.110,000 kilometers per hour

Why does the satellite move around the world at the same speed as the Earth rotates?

A.In order to take photographs.

B.In order to stay in a certain position in the orbit.

C.In order to move away from its orbit.

D.In order to send television pictures.

What does the underlined word “This” in the 3rd paragraph refer to?

A.A satellite.   B.A little rocket.

C.A satellite seems to stay in the same place in the sky.

D.The satellite puts the rockets in the right position.

Which is true of satellites?

A.A satellite usually works for about 10-12 years.

B.Every time a satellite gets broken,it is brought back to the Earth to be repaired.

C. A broken satellite is never left in space.

D. They often crash into each other.

查看答案和解析>>

Satellites are an important part of our ordinary lives.For example, the information for weather forecasts is sent by satellite.Some satellites have cameras which take photographs of the Earth to show how clouds are moving.Satellites are also used to connect our international phone calls.
Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to US through satellites.Airplane pilots also sometimes use a satellite to help them find their exact location.
We use satellites to send television pictures from one part of the world to another.They are usually 35,880 kilometers above the equator.Sometimes we can see a satellite in the sky and it seems to stay in the same place.This is because it is moving around the world at 11,000 kilometers an hour—exactly the same speed that the earth rotates.A satellite must orbit the Earth with its antennae(天线)facing the earth.Sometimes, it moves away from its orbit,So there are little rockets on it which are used to put the satellite back in the right position.This usually happens about every five or six days.
Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth.A satellite usually works for about 10-12 years.Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired.Often,very old or broken satellites are left in space to orbit the Earth for a very long time.This is very serious because some satellites use nuclear power and they can crash into each other.
【小题1】Which of the following is NOT done by satellites according to the passage?

A.Sending information for weather forecast.
B.Taking photographs of the Earth.
C.Sending TV pictures.
D.Providing food for airplane pilots.
【小题2】What’s the speed the earth rotates at?
A.35,880 kilometers per hour.B.335,880 kilometers per hour.
C.11,000 kilometers per hour.D.110,000 kilometers per hour
【小题3】Why does the satellite move around the world at the same speed as the Earth rotates?
A.In order to take photographs.
B.In order to stay in a certain position in the orbit.
C.In order to move away from its orbit.
D.In order to send television pictures.
【小题4】What does the underlined word “This” in the 3rd paragraph refer to?
A.A satellite.B.A little rocket.
C.A satellite seems to stay in the same place in the sky.
D.The satellite puts the rockets in the right position.
【小题5】Which is true of satellites?
A.A satellite usually works for about 10-12 years.
B.Every time a satellite gets broken,it is brought back to the Earth to be repaired.
C.A broken satellite is never left in space.
D.They often crash into each other.

查看答案和解析>>

Satellites are an important part of our ordinary lives.For example, the information for weather forecasts is sent by satellite.Some satellites have cameras which take photographs of the Earth to show how clouds are moving.Satellites are also used to connect our international phone calls.

Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to us through satellites.Airplane pilots also sometimes use a satellite to help them find their exact location.

We use satellites to send television pictures from one part of the world to another.They are usually 35,880 kilometers above the equator.Sometimes we can see a satellite in the sky and it seems to stay in the same place.This is because it is moving around the world at 11,000 kilometers an hour—exactly the same speed that the earth rotates.A satellite must orbit the Earth with its antennae(天线)facing the earth.Sometimes, it moves away from its orbit,So there are little rockets on it which are used to put the satellite back in the right position.This usually happens about every five or six days.

Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth.A satellite usually works for about 10-12 years.Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired.Often,very old or broken satellites are left in space to orbit the Earth for a very long time.This is very serious because some satellites use nuclear power and they can crash into each other.

72.Which of the following is NOT done by satellites according to the passage?

A.Sending information for weather forecast. B.Taking photographs of the Earth.

C.Sending TV pictures.                  D.Providing food for airplane pilots.

73.What’s the speed the earth rotates at?

A.35,880 kilometers per hour.     B.335,880 kilometers per hour.

C.11,000 kilometers per hour.     D.110,000 kilometers per hour

74.What does the underlined word “This” in the 3rd paragraph refer to?

A.A satellite.   B.A little rocket.

C.A satellite seems to stay in the same place in the sky.

D.The satellite puts the rockets in the right position.

75.Which is true of satellites?

A.A satellite usually works for about 10-12 years.

B.Every time a satellite gets broken,it is brought back to the Earth to be repaired.

C.A broken satellite is never left in space.D.They often crash into each other.

      

查看答案和解析>>

Satellites are an important part of our ordinary lives.For example, the information for weather forecasts is sent by satellite.Some satellites have cameras which take photographs of the Earth to show how clouds are moving.Satellites are also used to connect our international phone calls.

We use satellites to send television pictures from one part of the world to another.They are usually 35,880 kilometers above the equator.Sometimes we can see a satellite in the sky and it seems to stay in the same place.This is because it is moving around the world at 11,000 kilometers an hour—exactly the same speed that the earth rotates.A satellite must orbit the Earth with its antennae(天线)facing the earth.Sometimes, it moves away from its orbit,So there are little rockets on it which are used to put the satellite back in the right position.This usually happens about every five or six days.

Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth.A satellite usually works for about 10-12 years.Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired.Often,very old or broken satellites are left in space to orbit the Earth for a very long time.This is very serious because some satellites use nuclear power and they can crash into each other.

66.Which of the following is NOT done by satellites according to the passage?

A.Sending information for weather forecast.  

B.Taking photographs of the Earth.

C.Sending TV pictures.                               

D.Providing food for airplane pilots.

67.What’s the speed the earth rotates at?

A.35,880 kilometers per hour.     B.335,880 kilometers per hour.

C.11,000 kilometers per hour.     D.110,000 kilometers per hour

68.Why does the satellite move around the world at the same speed as the Earth rotates?

A.In order to take photographs.   

B.In order to stay in a certain position in the orbit.

C.In order to move away from its orbit. 

D.In order to send television pictures.

69.What does the underlined word “This” in the 3rd paragraph refer to?

A.A satellite. 

B.A little rocket.

C.A satellite seems to stay in the same place in the sky.

D.The satellite puts the rockets in the right position.

70.Which is true of satellites?

A.A satellite usually works for about 10-12 years.

B.Every time a satellite gets broken,it is brought back to the Earth to be repaired.

C.A broken satellite is never left in space.

D.They often crash into each other.

查看答案和解析>>

第三部分  阅读理解(共20小题;每小题2分,满分40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

Satellites are an important part of our ordinary lives.For example, the information for weather forecasts is sent by satellite.Some satellites have cameras which take photographs of the Earth to show how clouds are moving.Satellites are also used to connect our international phone calls.

Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to US through satellites.Airplane pilots also sometimes use a satellite to help them find their exact location.

We use satellites to send television pictures from one part of the world to another.They are usually 35,880 kilometers above the equator.Sometimes we can see a satellite in the sky and it seems to stay in the same place.This is because it is moving around the world at 11,000 kilometers an hour—exactly the same speed that the earth rotates.A satellite must orbit the Earth with its antennae(天线)facing the earth.Sometimes, it moves away from its orbit,So there are little rockets on it which are used to put the satellite back in the right position.This usually happens about every five or six days.

Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth.A satellite usually works for about 10-12 years.Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired.Often,very old or broken satellites are left in space to orbit the Earth for a very long time.This is very serious because some satellites use nuclear power and they can crash into each other.

56.Which of the following is NOT done by satellites according to the passage?

A.Sending information for weather forecast.

B.Taking photographs of the Earth.

C.Sending TV pictures.

D.Providing food for airplane pilots.

57.What’s the speed the earth rotates at?

A.35,880 kilometers per hour.     B.335,880 kilometers per hour.

C.11,000 kilometers per hour.     D.110,000 kilometers per hour

58.Why does the satellite move around the world at the same speed as the Earth rotates?

A.In order to take photographs.

B.In order to stay in a certain position in the orbit.

C.In order to move away from its orbit.

D.In order to send television pictures.

59.What does the underlined word “This” in the 3rd paragraph refer to?

A.A satellite.   B.A little rocket.

C.A satellite seems to stay in the same place in the sky.

D.The satellite puts the rockets in the right position.

60.Which is true of satellites?

A.A satellite usually works for about 10-12 years.

B.Every time a satellite gets broken,it is brought back to the Earth to be repaired.

C.A broken satellite is never left in space.

D.They often crash into each other.

查看答案和解析>>


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