单项选择题
A.打顶尖 B.打群头 C.抹贅芽 D.打老叶
A.55% B.20% C.70% D.60%
A.1 B.2 C.2-2.5 D.1-2.5
A.40-50% B.50-60% C.60-70% D.70-80%
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