单项选择题X 纠错
A．benefited a lot from their mathematical knowledge
B．shed light on disciplined school management
C．was brought about by privileged home training
D．owed a lot to the technological development
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单项选择题
A．The Atmosphere and Our Environment
B．Research on Radiation
C．Effects of Space Radiation
D．Importance of Protection Against Radiation
单项选择题
A．the Apollo mission was very successful
B．protection from space radiation is no easy job
C．astronauts will have deformed children or grandchildren
D．radiation is not a threat to well-protected space explorers
单项选择题
A．exposure to even tiny amounts of radiation is fatal
B．the effect of exposure to radiation is slow in coming
C．radiation is avoidable in space exploration
D．astronauts in spacesuits needn' t worry about radiation damage
单项选择题
A．Whatever
B．Whichever
C．What
D．However
单项选择题
A．spacious
B．suspicious
C．gracious
D．merciful
单项选择题
A．infinite
B．finite
C．innumerable
D．numerous
单项选择题
A．what
B．that
C．which
D．whose
单项选择题
A．moving about
B．moving along
C．moving off
D．moving on
