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若 $\log _{\mathrm{a}} 2 < \operatorname{logb} 2 < 0$, 则
A. $0 < {a} < {b} < 1$     B. $0 < {b} < {a} < 1$     C. ${a}>{b}>1$     D. $b>a>1$         
不再提醒