以下各类媒体中,属于存储媒体的是()。
A.图像
B.光盘
C.摄像机
D.同轴电缆
参考答案:B
全班人数一定,出席人数和缺席人数[ ]
A.成正比例
B.成反比例
C.不成比例
.We don't have many workers coming to the job interview. I'm afraid we may _____ workers
this time.
A.be a shortage of
B.have a shortage of
C.be short of
D.be in short of