共用题干
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_________(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.
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 October28, 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.
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.
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.
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.
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.

_________(13)
A:recommends
B:means
C:proposes
D:advises