()一般表现为紧张不安和忧虑的心境。
A.焦虑
B.恐惧
C.抑郁
D.神经衰弱
参考答案:A
—________ the latest Time magazine ________ yet?
—Sorry, it's late. Maybe tomorrow.[ ]
A. Will; arrive
B. Has; arrived
C. Do; arrive
D. Did; arrive
简述分组交换机中分组拆装设备的功能。