当有源应答器与地面电子单元（LEU）间发生通信等故障时，有源应答器不提供缺省报文
参考答案：错
世界的三大宗教是（ ）
A．基督教
B．佛教
C．犹太教
D．伊斯兰教
Here's a _____ in our office that when it's somebody's birthday, they bring in a cake for us all to share. [ ]
A. tradition
B. balance
C. concern
D. topic
