国家对生产安全事故实行责任追究制度。
参考答案：对
________ our journey by camel was!
A．What an exciting experience
B．What exciting experience
C．How excited experience
D．What an excited experience
用频谱仪测试GSM信号，RBW带宽设为300KHz时读数为15dBm，问若RBW带宽设为1MHz时读数为（）.
