下列数组中,不能构成无向图的度数列的数组是( ).
A. (1,1,1,2,3)
B. (1,2,3,4,5)
C. (2,2,2,2,2)
D. (1,3,3,3)
氯霉素不能与阿奇霉素合用的原因是:
A. 减少阿奇霉素的吸收
B. 抑制肝药酶活性,使阿奇霉素代谢减少
C. 竞争与细菌核糖体50S亚基的结合产生拮抗效应
D. 诱导肝药酶活性,使阿奇霉素代谢增加
E. 竞争与血浆蛋白结合,使阿奇霉素的血药浓度降低
A tone somewhat lower and quieter than normal speech should be ______ for greater clarity.
A. adopted
B. managed
C. conferred
D. transferred
微信支付 
支付宝支付