摘要： the people have become masters of their own country that science can really serve the people. A．Only then B．It is only then C．Only when D．It is only when
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30． the people have become masters of their own country that science can really serve the people.
A．Only then B．It is only when C．Only when D．It is only then
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30． the people have become masters of their own country that science can really serve the people.
A．Only then B．It is only when C．Only when D．It is only then
查看习题详情和答案>>the people have become masters of their own country that science can really serve the people.
A．Only then B．It is only when C．Only when D．It is only then
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