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【单选题】
Scientists say it may be five or ten years ______ it is possible to test this medicine on human patients.A.
since
B.
when
C.
after
D.
before
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【单选题】患者上腹胀,呕吐2天,清晨空腹就诊,查体发现上腹部振水音。最可能是
A.
正常
B.
胃内大量液体潴留
C.
腹腔内有大量液体
D.
腹腔内有游离气体
E.
腹腔内有肿块
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