头部对疼痛敏感的结构包括下列几种，除了
A．头皮及皮下组织
B．帽状腱膜和骨膜
C．头部血管、肌肉
D．内囊
E．头颈部神经
参考答案：D
邮件业务档案保管工作，应该根据邮件业务档案的形成特点和管理现状来进行。
There is a group of stocks containing 7, 8, 9, 10, 10, 10, 11, 12, 13 and 30. Which of the following statement about the distribution is TRUE（）
A. In this distribution the median is 12.
B. This distribution’s arithmetic mean is 10 and the median is 11.
C. The distribution is skewed to the right and the mean is greater than the mode.
