— May I ask for a day off tomorrow?

—______． You know, the May Day holiday is just around the corner and every salesgirl is as busy as a bee．  

A．It’s out of the question

B．No problem

C．None of my business

D．I don’t care

一带电粒子射入一正点电荷的电场中，运动轨迹如图所示，粒子从A运动到B，则（　　）

A．粒子带负电

B．粒子的动能一直变大

C．粒子的加速度先变小后变大

D．粒子在电场中的电势能先变小后变大