在工作频段带内隔离度的（）应满足该项指标的要求.否则，判定不合格.
A.最小值
B.最大值
C.平均值
D.以上都不对
参考答案：A
机动车倒车时，应当（）情况，确认安全后倒车。
A.从后视镜观察车后
B.从倒车雷达中观察车后
C.察明车后
D.察明车前
Cindy obeys her father because she knows that she will be punished for disobeying. Kohlberg would describe Cindy’s moral behavior as()
A．Immoral
B．Conventional
C．Preconventional
D．Postconventional
