A party was held ________ the heroes who had helped save thousands of lives in the big earthquake.[ ]

A．in time of  

B．in honor of

C．in danger of  

D．in place of

一用户说他的外置PS/2鼠标不能用了，在不关机的情况下，你应该给他安一个什么样的鼠标（）。

A、USB鼠标

B、串口鼠标

C、PS/2鼠标

D、激光伺服鼠标