根据经济学原理，以下定价法中( )可以实现资源配置达到帕累托最优。
A．平均成本定价B．成本分摊定价C．边际成本定价D．拉姆塞定价
参考答案：C
哪一部位不是下颌骨骨折的好发部位()
A．下颌骨升支
B．颏孔区
C．髁突颈部
D．正中联合
E．下颌角
— Oh, my cat is really fat.
— You __ have given her so much food.
A．wouldn't
B．mustn't
C．couldn't
D．shouldn't
