阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。
% h( U7 |$ d Y& } Solar Storm
. O& P; {! {5 r/ }. k 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_______(1) the solar energy increases. The release of the energy_______(2) place along with the activity of the sunspots with a cycle of: 11 years. This time, the_______(3) of the storm exceeded expectations. # ?& @% x% \, e* |
This_______(4) 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_______(5) in 19 hours. They could affect aircraft roaming (漫游) in space.
4 s s+ @: K# Y9 v& H 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_______(7) because it is under the protection of the earth’s magnetic field. - P, ^$ v' q/ l$ U
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_______(9) 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_______(10) the ground.
2 v) |& `2 ~( Z& \7 M- A+ I' J The geomagnetic storm caused by this round of solar storm reaches its highest level on the two_______(11) of the earth, which affects electricity supply of North America. Overexposure to_______(12) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it_______(13) we receive ten times the X-ray radiation. It’s really damaging. - H' y+ t; q( I5 o
Scientists say a solar eruption is like the sun sneezing, which will make the earth_______(14) a cold. Though this natural force is irresistible, scientists can still_______(15) its movement accurately by monitoring. Facing successive solar storms, humans can’t drop their guard
5 F+ q% U3 Z' r0 S 1 A since B when C until D though , u4 B6 m) U, E$ d+ c
2 A finds B adjusts C holds D takes www.Examw.com3 d5 b2 _6 N5 x2 K% q2 g
3 A intensity B height C width D density + z: }- a$ S9 ^7 } F2 }8 A
4 A piece B part C round D set
- a+ R8 q7 Z( X( z2 P! C. C) K 5 A star B earth C moon D sun
0 `5 `- @8 H- D; U 6 A dominate B develop C damage D descend
) e! i3 p2 C1 B, W n 7 A safe B dangerous C comfortable D manageable 6 C: y4 p) z0 Z! D: W7 N2 D
8 A limit B cause C force D threat ) @4 k3 f O( V6 o. B
9 A separate B benefit C distinguish D protect
+ {3 I) c- R! V2 Z' [/ o9 c 10 A lose B reach C break D prepare
( ? g7 F$ Q |8 J8 j 11 A poles B mountains C rivers D lakes
3 M& E x3 g4 x" Y4 B 12 A light B storm C radiation D pressure
$ N$ ~; Z! p4 W. F7 K/ } 13 A recommends B means C proposes D advises % g0 `1 J) |* j v
14 A turn B stop C become D catch
& q9 Y V3 p- X1 N3 z5 m) r 15 A detect B start C experience D change
: h& |% [0 k6 V 【参考答案】 1.B 2. D 3. A 4. C 5. B 6. C 7. A 8. D 9. D 10. B 11. A 12. C 13. B 14. D 15. A |
发表于 2012-8-16 00:07:50
