更多"Scientists think that by the year 2"的相关试题:
[单项选择]Why do many scientists think animals are basically sleepwalkers
A. Because animals learn to carry out complex actions.
B. Because animals are trained to carry out complex actions.
C. Because animals carry out complex actions in response to stimuli.
D. Because animals carry out complex actions without awareness.
[单项选择]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
[单项选择]Scientists think ______ helps some trees to conserve water in winter.
A. when losing leaves
B. leaves are lost
C. that losing leaves
D. the leaves losing
[单项选择]According to the passage, scientists used to think that the X-rays were produced by ______.
A. making sparks in laboratory
B. discharges of high-energy electron in the Sun, in exploding stars, and in lightning
C. electrons escaping their normal connections
D. radio waves
[单项选择]The report the scientists made this year ______ the weaknesses of modern medical practice.
A. exposed
B. struggled
C. rejected
D. explored
[单项选择]By the year 2010, scientists probably ______ an effective treatment for cancer.
A. will have discovered
B. are discovering
C. will be discovering
D. have discovered
[单项选择]Scientists are eager to talk with other scientists working on similar problems．
A. 科学家热衷于与从事类似课题研究的其他科学家交流。
B. 科学家更容易与其他科学家谈话来解决相同的问题。
C. 科学家很乐意在解决类似问题时同其他科学家交流。
D. 科学家更容易就雷同的问题与其他科学家交谈。
[单项选择]—This dress was last years style.
—I think it still looks perfect it has gone out this year.
A. so that
B. even though
C. as if
D. ever since
[单项选择]—This dress was last years style.
—I think it still looks perfect it has gone out this year.
A. so that
B. even though
C. as if
D. ever since
[单项选择]After a year's hard work I think I am ______ to a long holiday.
A. entailed
B. deserved
C. entitled
D. satisfied
[单项选择]Medical scientists believe that
A. tests have been designed to settle the cholesterol dispute
B. drugs have been tested to reduce the amount of the substance in blood
C. low cholesterol foods or anti-cholesterol drugs or both can reduce the chance of a heart attack
D. none of the statements mentioned above is correct
[单项选择]Scientists assume that unrestrained population growth and dwindling resources may force humans to look to the sea for food.
A. unavoidable
B. unexpected
C. unchecked
D. unfortunate
[单项选择]Most scientists agree this outpouring contributes to global warming, which could eventually lead to coastal flooding, ______ weather, and widespread crop loss.
A. intensive
B. extreme
C. unpleased
D. unique
[单项选择]Why did the famous scientists become successful [A] Because they remembered all the facts. [B] Because they knew how to study. [C] Because they didn't get everything from school.
[单项选择]To study animal emotions, scientists should
A. set up improved and refined skillful experiments.
B. analyze human emotional.
C. distinguish what is emotional and what is conditioned.
D. learn from animal behaviorists.
[单项选择]Political scientists believe that the important cause for decreasing voter turnout is ______.
A. the inconvenience of voting
B. the commercialization of the voting procedures
C. the lack of interest and enthusiasm in politics
D. the insecurity of voting on line due to the constant breakdown of computer systems
