47.
The reason why the college students lost may be that they have _____.
A. got
too tired to take the tests B.
taken no brain room for this skill
C.
taken no interest in the tests D.
got a little older to react quickly

D
It is
winter and as you have probably noticed, germs are everywhere-runnng noses,
sore throats, high fever, headache, nothing quite like the common cold to make
you feel miserable.
But
experts believe that there is no link between cold weather and catching colds.
So why are we particularly weak in this season, and why do we frequently catch
colds?
Interact
medicine expert, Dr Meenaskshi Jain of Max Hospital
says, “One reason could be because people are likely to stay indoors, so the
virus can spread easily. Also the viruses are created quickly in wet space.”
The
common cold is a viral infection(病毒性感染)that can be caused by any of
up to 250 strains of virus, the most common group of which are the rhinovirus
that hit the nose. They are responsible for anywhere between a third and half
of all common colds.
“They
are spread through the nose and respiratory passages(呼吸道), by touching,
and by contacting with airborne dusts that are created by sneezing or
coughing,” says Dr Jain.
There
is no cure for the common cold and antibiotics(抗生素)are of no help. However,
there are some premeasures which can help:
Wash
your hands regularly, so that germs get killed.
Don’t
share your drinking glasses with anyone as this will prevent the spread og the
virus.
Drink
lots of water to avoid dehydration(脱水).
Make
sure to eat enough fruits to improve your immune system.
Get
enough sleep and you’ll certainly become stronger.