更多"Scientists ______ that there is no "的相关试题:
[单项选择]Scientists ______ that there is no animal life on Mars.
A. ensure
B. assure
C. resume
D. assume
[单项选择]According to the scientists, life came from ___________.
A. combination of energy and biochemical materials
B. combination of nucleic acid and amino molecules
C. nucleic acid molecules
D. amino acid molecules
[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]Scientists cannot create actual life in laboratory because ___________.
[单项选择]Scientists believe that when life on earth began, the earth atmosphere consisted of ___________.
A. oxygen and nitrogen
B. hydrogen, oxygen and nitrogen
C. hydrogen and its compounds
D. hydrogen, oxygen and their compounds
[单项选择]Most scientists believe it is ______ to use animals in medical research.
A. legitimate
B. explicit
C. edible
D. illiterate
[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]My decisions to spend my life enjoying wild animal was ______, maybe even queer and impractical.
A. unconvertible
B. unconventional
C. unconditional
D. uncountable
[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]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
