According to the report, some well-known scientists believe that there is not enough oxygen on Mars to __________ human life.()
A: sustain
B: retain
C: remain
D: entertain
A: sustain
B: retain
C: remain
D: entertain
A
举一反三
- According to some scientists, global warming the survival of the whole human race.
- Some that the distant planet could sustain life. But so far there is no solid evidence for any signs of life there.
- Some scientists think there may have been life on the Mars in the past because （） A: there is no life there now B: there is a large amount of water at the poles C: the Mars may be able to support life in the future D: conditions may have been similar to those on the Earth
- He built a pair of wings of a size suitable to _______ his own weight, and made use of gravity as his motor. A: entertain B: retain C: obtain D: sustain
- According to the passage, dogs and cats ______ . A: as well as human beings cannot see some colours B: have fewer cones than human beings C: have less rods than human beings D: can see colours as well as human beings
内容
- 0
It is well known that teaching is a job ________ enough patience.
- 1
Some old people have an aversion to Rock and Roll because they can________ somuch noise. A: sustain B: entertain C: endure D: admire
- 2
保留，记住____________ A: sustain B: retain
- 3
Some believe it is a result of human activity while others believe it is a natural phenomenon. ______
- 4
All creatures need water to ( ) life, whether it be birds, animals, or human beings. A: indict B: stem C: sustain D: mainstream