_____ in the regulations that you _____ other people the password of your e-mail account.[ ]

A. What is required; wouldn't tell

B. As requires; shouldn't tell

C. It is required; not tell

D. It requires; shouldn't tell

显微外科缝合肌腱用（）号线，缝合神经用（）号或（）号无损伤线，血管吻合用（）无损伤线，吻合指动静脉则需（）无损伤线。