单项选择题


Passage One
Questions 26 to 28 are based on the passage you have just heard.

A．Immediate action.
B．Accurate diagnosis.
C．Medical knowledge.
D．Expert experience.
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单项选择题
A．1940s.B．1910s.C．1930s.D．1920s.
A．1940s.
B．1910s.
C．1930s.
D．1920s.
单项选择题
A．Scientists are curious about the space.B．Scientists are trying to find a new planet for human beings.C．Scientists need to study the influence of gravity on different species.D．Scientists are experimenting with species that can survive only in space.
A．Scientists are curious about the space.
B．Scientists are trying to find a new planet for human beings.
C．Scientists need to study the influence of gravity on different species.
D．Scientists are experimenting with species that can survive only in space.
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