摘要: Next summer after taking the national entrance examination, I’ll stay in Hainan Island, will surely be an exciting holiday. A. when B. which C. that D. where

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The 2012 London Olympics had enough problems to worry about. But one more has just been added -- a communications blackout caused by solar storms.

  After a period of calm within the Sun, scientists have detected the signs of a flesh cycle of sunspots that could peak in 2012, just in time for the arrival of the Olympic torch in London.

  Now scientists believe that this peak could result in vast solar explosions that could throw billions of tons of charged matter towards the Earth, causing strong solar storms that could jam the telecommunications satellites and interact links sending five Olympic broadcast from London.

  "The Sun's activity has a strong influence on the Earth. The Olympics could be in the middle of the next solar maximum which could affect the functions of communications satellites," said Professor Richard Harrison, head of space physics at the Rutherford Appleton Laboratory in Oxfordshire.

  At the peak of the cycle, violent outbursts called coronal mass ejections (日冕物质抛射) occur in the Sun's atmosphere, throwing out great quantities of electrically-charged matter. "A coronal mass ejection can carry a billion tons of solar material into space at over a million kilometres per hour. Such events can expose astronauts to a deadly amount, can disable satellites, cause power failures on Earth and disturb communications," Professor Harrison added. The risk is the greatest during a solar maximum when there is the greatest number of sunspots.

  Next week in America, NASA is scheduled to launch a satellite for monitoring solar activity called the Solar Dynamics Observatory (SDO), which will take images of the Sun that are 10 times clearer than the most advanced televisions available.

  The Rutherford Appleton Laboratory helped to make the high-tech cameras that will capture images of the solar flares (太阳耀斑) and explosions as they occur.

  Professor Richard Harrison, the lab's director, said that the SDO should be able to provide early warning of a solar flare or explosion big enough to affect satellite communications on Earth "If we have advanced warning, we'll be able to reduce the damage. What you don't want is things switching off for a week with no idea of what's caused the problem," he said.

1.The phrase "communications blackout" in paragraph 1 most probably refers to____________ during the 2012 Olympics.

A.the extinguishing of the Olympic torch

B.the collapse of broadcasting systems

C.the transportation breakdown in London

D.the destruction of weather satellites

2.According to the passage, scientists are convinced that __________.

A.the sun’s activities have little to do with the earth

B.the London Olympic broadcasting will be possibly influenced by the 2012 peak of sunspots

C.the 2012 Olympic Games are during the solar maximum of throwing out greatest number of sunspots

D.solar explosion will cause strong storms on the earth

3.What can be inferred about the solar activity described in the passage?

A.The most fatal matter from the corona falls onto Earth.

B.The solar storm peak occurs in the middle of each cycle.

C.It takes several seconds for the charged matter to reach Earth.

D.The number of sunspots declines after coronal mass ejections.

4.According to the passage, NASA will launch a satellite to _________.

A.take images of the solar system

B.provide early warning of thunderstorms

C.keep track of solar activities

D.improve the communications on Earth

5.Which of the following might be the best title of the passage?

A.Solar Storms: An Invisible Killer

B.Solar Storms: Earth Environment in Danger

C.Solar Storms: Threatening the Human Race

D.Solar Storms: Human Activities to Be Troubled

 

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阅读理解

  A very rapid increase in the number of cars began almost immediately after they were invented to meet the need for the regular rapid transportation and convenience.The car is such a part of our everyday life and so much taken for granted nowadays that we rarely think twice when we get into it and get it started.The USA is even referred to as“a nation on wheels”.But how many of you have ever thought how the car is designed and operated?

  In cars of normal design, the petrol system is made up of three main parts:storage tank, a pump and a carburetor.

  The petrol tank is fitted at the back of the car where it is out of the way, yet easily filled at a gas station.Tanks are in various capacity but they usually hold enough petrol for 250-300 miles running.Because the tank is at the opposite end of the car from the carburetor, which is fitted high up on the engine, a pump is needed to draw the petrol from one to the other, so it is from the carburetor that the petrol is finally fed into the engine.Pumps can be of two kinds:electrically operated or mechanically driven from the engine.

  Next time when you are driving a car, you may wonder what a great and magic invention the car is.

(1)

Choose one picture which shows the correct petrol system described in this passage.

[  ]

A.

B.

C.

D.

(2)

The passage tells the reason why ________.

[  ]

A.

there are different types of tanks in capacity

B.

the tank is designed at the back of the car

C.

the pump is mechanically driven from the engine

D.

the petrol is fed into the engine from the carburetor

(3)

It is necessary to use a pump to send petrol to carburetor because ________.

[  ]

A.

the engine needs supplying with a certain amount of petrol

B.

the pump can press the petrol to recycle

C.

the carburetor has difficulty in drawing petrol from the tank

D.

the tank isn't fitted in proper position

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