题目内容
（请给出正确答案）
The "impact theory" sounds reasonable because_____ .
A．scientists have found what happened billions of years ago
B．it is based on the newly gathered information about Mars
C．it can answer many questions raised about the moon and the earth
D．astronauts believe that the moon and the earth are of the same age
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B.Positivist theory
C.Use theory
D.Speech Acts theory
Palese s experiments with the guinea pigs______.
A．fully support Theory 3
B．partly confirm Theory 2
C．raise doubt on Theory 1
D．find little evidence for all theories
In no way______from practice.
A．theory can be separated
B．theory is separated
C．can theory be separated
D．has theory been separated
A.错误
B.正确
In no way ______from practice.
A．theory can be separated
B．theory is separated
C．can theory be separated
D．has theory been separated
The A(anti-smoking) campaign B(on campus) has made C(quite an impact) D(with) the students.
Barany's theory was proved incorrect______.
A．in zero gravity
B．in cold air
C．in hot air
D．in strong wind
A.advance
B.defy
C.justify
D.translate
