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【单选题】
为使葡萄保持其优良性状，果农们常采用的繁殖方法和为了在短时间内产生大批无病毒，科学家们常采用的繁殖方法依次是（ ）A.
嫁接、扦插
B.
扦插、压条
C.
扦插、植物组织培养
D.
压条、植物组织培养
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