下图是“中国、西方古代科技成果比较”,对此图解读正确的是 A.明清时期中国科技发展由先进走向落后 B.中国古代科技始终领先于西方 C.公元前后中国科技达到最高峰 D.公元10世纪时中国与西方科技差异最大 答案:A________ the programme, they have to stay there for another two weeks.
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A.Not completingB.Not completed
C.Not having completedD.Having not completed