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1. 阅读理解
According to a team of researchers,
an animal's ability
to perceive(感知)time is linked to their pace of life.
"Our results lend support to the
importance of time perception in animals where the ability to perceive time in
a very short time may be the difference between life and death for fast moving
creatures." commented lead author Kevin Healy from Trinity College Dublin.
The study was done with a variety of animals
using phenomenon based on the maximum speed of flashes of light an individual
can see before the light source is seen as constant. Dogs,
for example,
have eyes with a
refresh rate higher than humans.
One example of this phenomenon at work,
the authors say,
is the housefly and
its ability to avoid being hit. The research showed flies "observe motion
in a shorter time than our own eyes can achieve, "which allows them to avoid being
hit.
Professor Graeme Ruxton of the University
of St Andrews in Scotland, who worked jointly on the research
project, said in a statement, "Having eyes that send updates to
the brain at much higher frequencies than our eyes do is of no value if the
brain cannot process that information equally quickly. Thus,
this work
highlights the impressive abilities of even the smallest animal brains. Flies
might not be deep thinkers, but they can make good decisions very
quickly."
In comparison, the tiger beetle(虎甲虫)runs
faster than its eyes can keep up, basically becoming blind,
which requires it
to stop periodically to re-evaluate its prey's(猎物)position.
Our results suggest that time perception
offers an as yet unstudied dimension along which animals can specialize and there
is considerable range to study this system in more detail.
（1）What is the research mentioned in the passage mainly about？
A . Pace of life of animals.
B . Impressive abilities of animals.
C . Lifetime of small animals.
D . Time perception of animals.
（2）What does Kevin Healy's comment mean in Para.2？
A . The survival of fast moving animals relies on their ability to perceive time.
B . Animals with quicker pace of life have better perception of time.
C . The ability of animals to perceive time depends on their high moving speed.
D . Animals with poor ability of time perception have a shorter life.
（3）Why can houseflies avoid being hit?
A . They can think very deeply before they act.
B . They can process the information as quickly as they receive it.
C . They can fly much faster than their eyes can keep up.
D . They can send information to brain more quickly than to their eyes.
（4）What will a tiger beetle have to do to catch a moving prey?
A . Slow down to gain its time perception.
B . Prevent itself from becoming blind.
C . Stop occasionally to spot the prey again.
D . Try to run as fast as it can.
