Solar Storm

　　At the end of October 2003, a sudden solar storm hit the earth. A solar storm _1_ the large amounts of charged particles released into space when the solar energy increases. The release of the energy takes place _2_ with the activity of the sunspots with a cycle of 11 years. This time, the _3_ of the storm exceeded expectations.

　　This _4_ of intense solar storms was caused by the eruption of a solar flare and the ejection of the solar corona on October 28, 2004. Large amounts of charged particles moved 150,000,000 kilometers through space toward the _5_ in 19 hours. They could affect aircraft roaming in space. The high-energy particles will _6_ some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is safe because it is under the _7_ of the earths magnetic field.

　　A solar storm not only affects aircraft but also is a _8_ to the environment and humans. The aerosphere and magnetic field of the earth can protect humans from ultraviolet radiation and X-rays. _9_ most of the X-rays are absorbed after it enters the aerosphere, still a few can reach the ground. This kind of radiation, if any, only lasts for several minutes or dozens of minutes, so its effect on humans is very _10_.

　　The geomagnetic storm caused by this round of solar storm reaches its highest _11_ on the two poles of the earth, which affects electricity supply of the northern America. Overexposure to radiation threatens the health of passengers on planes flying _12_ the Polar Regions. If we fly in the sky during such a solar storm, it means we receive ten times the X-ray radiation. Its _13_ damaging.

　　Scientists say a solar eruption is like the sun sneezing, which will make the earth catch cold. Though this natural force is irresistible, scientists can _14_ detect its movement accurately by monitoring. Facing successive solar storms, humans cant drop their _15_.

　　1. A. refers to

　　B. depends on

　　C. prevents from

　　D. acts on

　　正确的答案是: A

　　2.A. among

　　B. above

　　C. along

　　D. aboard

　　正确的答案是: C

　　3.A. height

　　B. intensity

　　C. color

　　D. shape

　　正确的答案是: B

　　4.A. piece

　　B. portion

　　C. set

　　D. round

　　正确的答案是: D

　　5.A. sun

　　B. earth

　　C. star

　　D. moon

　　正确的答案是: B

　　6.A. delete

　　B. determine

　　C. damage

　　D. detect

　　正确的答案是: C

　　7.A. protection

　　B. usage

　　C. change

　　D. float

　　正确的答案是: A

　　8.A. resistance

　　B. means

　　C. help

　　D. threat

　　正确的答案是: D

　　9.A. Who

　　B. While

　　C. Where

　　D. What

　　正确的答案是: B

　　10.A. many

　　B. much

　　C. little

　　D. few

　　正确的答案是: C

　　11.A. position

　　B. part

　　C. concern

　　D. level

　　正确的答案是: D

　　12.A. with

　　B. outside

　　C. over

　　D. on

　　正确的答案是: C

　　13.A. really

　　B. seldom

　　C. hardly

　　D. impossibly

　　正确的答案是: A

　　14.A. too

　　B. such

　　C. so

　　D. still

　　正确的答案是: D

　　15.A. guide

　　B. guard

　　C. guess

　　D. game

　　正确的答案是: B

　　Solar Storm

　　At the end of October 2003, a sudden solar storm hit the earth. A solar storm _1_ the large amounts of charged particles released into space when the solar energy increases. The release of the energy takes place _2_ with the activity of the sunspots with a cycle of 11 years. This time, the _3_ of the storm exceeded expectations.

　　This _4_ of intense solar storms was caused by the eruption of a solar flare and the ejection of the solar corona on October 28, 2004. Large amounts of charged particles moved 150,000,000 kilometers through space toward the _5_ in 19 hours. They could affect aircraft roaming in space. The high-energy particles will _6_ some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is safe because it is under the _7_ of the earths magnetic field.

　　A solar storm not only affects aircraft but also is a _8_ to the environment and humans. The aerosphere and magnetic field of the earth can protect humans from ultraviolet radiation and X-rays. _9_ most of the X-rays are absorbed after it enters the aerosphere, still a few can reach the ground. This kind of radiation, if any, only lasts for several minutes or dozens of minutes, so its effect on humans is very _10_.

　　The geomagnetic storm caused by this round of solar storm reaches its highest _11_ on the two poles of the earth, which affects electricity supply of the northern America. Overexposure to radiation threatens the health of passengers on planes flying _12_ the Polar Regions. If we fly in the sky during such a solar storm, it means we receive ten times the X-ray radiation. Its _13_ damaging.

　　Scientists say a solar eruption is like the sun sneezing, which will make the earth catch cold. Though this natural force is irresistible, scientists can _14_ detect its movement accurately by monitoring. Facing successive solar storms, humans cant drop their _15_.

　　1. A. refers to

　　B. depends on

　　C. prevents from

　　D. acts on

　　正确的答案是: A

　　2.A. among

　　B. above

　　C. along

　　D. aboard

　　正确的答案是: C

　　3.A. height

　　B. intensity

　　C. color

　　D. shape

　　正确的答案是: B

　　4.A. piece

　　B. portion

　　C. set

　　D. round

　　正确的答案是: D

　　5.A. sun

　　B. earth

　　C. star

　　D. moon

　　正确的答案是: B

　　6.A. delete

　　B. determine

　　C. damage

　　D. detect

　　正确的答案是: C

　　7.A. protection

　　B. usage

　　C. change

　　D. float

　　正确的答案是: A

　　8.A. resistance

　　B. means

　　C. help

　　D. threat

　　正确的答案是: D

　　9.A. Who

　　B. While

　　C. Where

　　D. What

　　正确的答案是: B

　　10.A. many

　　B. much

　　C. little

　　D. few

　　正确的答案是: C

　　11.A. position

　　B. part

　　C. concern

　　D. level

　　正确的答案是: D

　　12.A. with

　　B. outside

　　C. over

　　D. on

　　正确的答案是: C

　　13.A. really

　　B. seldom

　　C. hardly

　　D. impossibly

　　正确的答案是: A

　　14.A. too

　　B. such

　　C. so

　　D. still

　　正确的答案是: D

　　15.A. guide

　　B. guard

　　C. guess

　　D. game

　　正确的答案是: B