________with fright, a hungry fox hid himself in a small cave, ________his tail to the rain.

A．Trembling; exposing

B．Trembled; exposed

C．Trembled; exposing

D．Trembling; exposed

SSS300系统的显示屏显示出“←”态时是（）表示。

A、等待

B、电瓶电压

C、高压

D、数据