单项选择题

A．medical care
B．food
C．cosmetics
D．services
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Snow was falling at the launch site shortly before lift off but stopped at about the time the astronauts entered their craft, Xinhua news agency reported.
单项选择题
A．onB．in turnC．by turnsD．further
A．on
B．in turn
C．by turns
D．further
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