一般所选摄像机的灵敏度为被摄物体表面照度的( )。
A．1/10 B．1/20 C．1/30 D．1/40
参考答案：A
解析： 摄像机选型要点
— Have you heard that Jones, along with her parents, _____ to Hainan for the winter vacation?
— Really? No wonder I haven't seen her these days. [ ]
A. has been
B. have been
C. has gone
D. have gone
股份公司申请股票上市的条件之一是股本总额不少于（）万元。
A、1000
B、2000
C、3000
D、5000
