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Section B
Directions:
Read the following three passages. Each passage is followed by several questions or
unfinished statements. For each of them there are four choices marked A, B, C and D. Choose the
one that fits best according to the information given in the passage you have just read.
(C)
A group of college students is hoping to place a satellite powered only by water into an
orbit
(
杞ㄩ亾
) around the moon.
The students are from Cornell University in the
state
of
New
York.
They
are
taking
part
in
a
competition called the Cube Quest Challenge. It is a
program of NASA, the American space agency. The
Cornell
team
is
called
the
CisLunar
Explorers.
The
word
cislunar
means
鈥渂etween
the
earth
and
the
moon.鈥?/p>
The
challenge
is
simple:
to
design,
build
and
deliver
鈥渇light
-
qualified,
small
satellites.鈥?nbsp;
NASA
off
icials
say
the
satellites
must
be
able
to
perform 鈥渁dvanced operations near and beyond the moon.鈥?/p>
Ten
teams
are
taking
part
in
the
competition.
But
the
CisLunar
Explorer
satellites
are
different. They are the only ones using water to power their spacecraft.
The
idea
for
a
water-powered
vehicle
came
from
Mason
Peck,
who
works
at
Cornell
University.
He
once
worked
as
NASA鈥檚
chief
technologist.
He
has
always
wanted
to
use
something
other
than
rockets
to
push
spacecraft
beyond
earth.
鈥淎
lot
of
the
mass
we
send
into
orbit these days is in the form of rockets --
the only way we get anything into space,鈥?nbsp;he said, in a
Cornell press release. 鈥淏ut what if we could use what鈥檚 already there? If we could do that, if we
could re-
fuel spacecraft while they鈥檙e already in space...鈥?/p>
The spacecraft is shaped like the English letter L. It measures about 30 centimeters in length,
and the two pieces are connected. Water is stored in the lower part of the satellite. The sun will
separate the water into two elements: hydrogen and oxygen. When one combines hydrogen and