【单选题】站姿礼仪操作标准要求站立时 头正、颈直、( )、臂垂、挺胸、收腹。
【简答题】She did her best to _____________ her critics.
【单选题】在柴油机中,润滑的作用有()。Ⅰ.防震Ⅱ.调整间隙Ⅲ.减磨Ⅳ.冷却
【单选题】What is the best choice for the following blank? She did her best to appear ________.
【单选题】How did the author react to Jennie's relationship with her boy friend?
A.
She tried her best to dissuade Jennie from continuing it.
B.
She threatened to break up with Jennie if her advice was ignored.
C.
She was overcome with pride that Jennie told her about her boy friend.
D.
She was very angry with Jennie for choosing such a friend.
【单选题】She did her best______ her ability.