学位英语

2006年职称英语理工类a级考试试题及答案

第6部分：完形填空（第51～65题，每题1分，共15分）

下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。

Solar Storm

At the end of October 2003， a sudden solar storm hit the earth. A.solar storm refers to the large amounts of charged particles released into space______（51）the solar energy increases. The release of the energy______（52） place along with the activity of the sunspots with a cycle of： 11 years. This time， the______（53） of the storm exceeded expectations.

This______（54） of intense solar storm was caused by the eruption of a solar flare （闪光） and the ejection （喷发） of the solar corona （日冠） on October 28， 2003. Large amounts of charged particles moved 150，000，000 kilometers through space toward the______（55） in 19 hours. They could affect aircraft roaming （漫游） in space.

The high-energy particles will______（56） 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______（57）because it is under the protection of the earth’s magnetic field.

A solar storm not only affects aircraft but also is a______（58） to the environment and humans. The aerosphere and magnetic field of the earth can______（59） humans from ultraviolet radiation and X-rays. While most of the X-rays

are absorbed after they enter the aerosphere （大气层）， still a few can______（60） the ground.

The geomagnetic storm caused by this round of solar storm reaches its highest level on the two______（61） of the earth， which affects electricity supply of North America. Overexposure to______（62） threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm， it______（63） we receive ten times the X-ray radiation. It’s really damaging.

Scientists say a solar eruption is like the sun sneezing， which will make the earth______（64） a cold. Though this natural force is irresistible， scientists can still______（65） its movement accurately by monitoring. Facing successive solar storms， humans can’t drop their guard

51

A.since

B.when

C.until

D.though

52

A.finds

B.adjusts

C.holds

D.takes

53

A.intensity

B.height

C.width

D.density

54

A.piece

B.part

C.round

D.set

55

A.star

B.earth

C.moon

D.sun

56

A.dominate

B.develop

C.damage

D.descend

57

A.safe

B.dangerous

C.comfortable

D.manageable

58

A.limit

B.cause

C.force

D.threat

59

A.separate

B.benefit

C.distinguish

D.protect

60

A.lose

B.reach

C.break

D.prepare

61

A.poles

B.mountains

C.rivers

D.lakes

62

A.light

B.storm

C.radiation

D.pressure

63

A.recommends

B.means

C.proposes

D.advises

64

A.turn

B.stop

C.become

D.catch

65

A.detect

B.start

C.experience

D.change

参考答案：

BDACB CADDB ACBDA

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