单项选择题

A．20-50 years.
B．50-100 years.
C．100-120 years.
D．200-500 years.
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单项选择题
A．He is very concerned about the North Korea’s nuclear program.B．He favors aggressive diplomacy to resolve the crisis.C．He thinks US troops should continue to join UN peace-keeping missions.D．He thinks large American units should not remain under US command.
A．He is very concerned about the North Korea’s nuclear program.
B．He favors aggressive diplomacy to resolve the crisis.
C．He thinks US troops should continue to join UN peace-keeping missions.
D．He thinks large American units should not remain under US command.
单项选择题
A．Blowing.B．Splitting atoms.C．Joining atoms.D．None of the above.
A．Blowing.
B．Splitting atoms.
C．Joining atoms.
D．None of the above.
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