单项选择题X 纠错
Mars is not, it seems, the dry old
planet we once believed it to be. Astronauts who are (1) to
go there in the next decade may find plenty (2) water to
slake(消除) their thirst.
And with water present the (3)
of finding some sort of life on Mars are (4)
brighter.
This is the view of 40 (5) all
over the world who have been analyzing (6) of pictures and
other scientific (7) obtained by robot explorers in the
sixties and seventies.
To begin with, scientists thought the Red
Planet was as (8) as the Moon with dust storms swirling over
vast sandy (9) . But now the picture is very different with
mountains and valleys carved by (10) glaciers and torrential
rivers rushing and rumbling deep underground.
In a report on the
(11) of the Martian pictures Dr. Michael Car of the U.S.
Geological Survey comments, "I am (12) there’s lots of
water on Mars." Any surface water will be in the (13) of
ice. But it could (14) explorers having to take so much
fresh (15) with them.
The report says
(16) Mars probably had a warmer climate in ages
(17) due to its axis having been more steeply tilted towards
the Sun.
(18) convincing signs of plant or
animal life have been (19) by instruments soft. landed on
Mars, (20) only the immediate vicinity of landing vehicles
could be examined.
A．expected
B．hoped
C．required
D．eager
你可能喜欢
单项选择题
Most worthwhile careers require some
kind of specialized training. Ideally, therefore, the choice of an (1)
should be made even before choice of a curriculum in high school.
Actually, (2) , most people make several job choices during
their working lives, (3) because of economic and industrial
changes and partly to improve their position. The "one perfect job" does not
(4) . Young people should (5)
enters into a broad flexible training program that will (6)
them for a field of work rather than for a single (7)
.
Unfortunately many young people have to make career
plans (8) benefit of help from a(n) (9)
vocational counselor or psychologist. Knowing (10) about the
occupational world, or themselves for that matter, they choose their lifework on
a hit-or-miss basis. Some (11) from job to job. Others
(12) to work in which they are unhappy and for which they
are not fitted.
One common mistake is choosing an occupation for
(13) real or imagined prestige. Too many high school
students--or their parents for them--choose the professional field,
(14) both the relatively small proportion of workers in the
professions and the extremely high educational and personal (15)
.The imagined or real prestige of a profession or a white-collar job
is no good (16) for choosing it as life’s work.
(17) , these occupations are not always well paid, since a
large (18) of jobs are in mechanical and manual work, the
(19) of young people should give serious (20)
to these fields.
A．identification
B．entertainment
C．accommodation
D．occupation
