第10题: [多项选择]关于SOAD单板端口说法正确的有?() A. MID2为光输出口,合路信号中不需要波长上下的业务信号由MID1口输出 B. MID1为光输入口,接收来自不需要进行波长上下的MID1信号,并且与完成上路的信号合波后由OUT口输出 C. IN为合路信号输入光口,接收来自上游的合路信号 D. OUT为合路信号输出光口,输出完成波长上下的合路信号至下游 参考答案:C, D
第21题: [单项选择]What do we know about the speaker’s friend A. He was once a friend of the ruler. B. He was a tax collector. C. He was a government official. D. He was once a school teacher in India. 参考答案:D 答案解析:[听力原文]19-21
A friend of mine told me that when he was a young man, he went to work as a teacher