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【单选题】
( )科学家对DNA分子链通过单分子纳米操纵,用DNA分子片段构建的字母DNA。A.
美国
B.
中国
C.
法国
D.
英国
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反馈参考答案：
举一反三
【简答题】______ (中国的服务产业), on this basis, is well-developed and roughly as large as those of Japan, South Korea and Taiwan.
【简答题】观察验槽的重点应选择在（ ）。
【单选题】The length of his interview meant that ______
A.
he had not done well in the intelligence test
B.
he was not going to be offered the job
C.
he had little work experience to talk about
D.
he did not like the examiner
【单选题】Well, it seemed that my misgivings had had no basis. (Para.13)
A.
Well, it seemed that my regret is without good reason.
B.
Well, perhaps my doubt, worry and fear about what school would be like were all groundless.
C.
Well, it seemed wrong to stay at school.
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