计算机用的鼠标是（）。
A.输入设备
B.输出设备
C.监视设备
参考答案：A
From the deep valley ______, which had my heart in my mouth.
A．came a frightening sound
B．a frightening sound came there
C．did a frightening sound come
D．a frightening sound did come
建筑生活给水系统，有哪几种基本的给水方式？
