第8题: [单项选择]What nationality is Mary A. She is Chinese. B. She is Japanese. C. She is American. 参考答案:C 答案解析:[听力原文] W: Mary is an American, but she’s lived in the Far East for most of her life. M: Yes. S
第20题:[单选题]线路停电操作,必须按照()的顺序操作;送电顺序与上相反。(1.0分) A. 拉开开关、电源(母线)侧刀闸、负荷(线路)侧刀闸 B. 拉开开关、负荷(线路)侧刀闸、电源(母线)侧刀闸 C. 拉开负荷(线路)侧刀闸、开关、电源(母线)侧刀闸 D. 拉开电源(母线)侧刀闸、开关、负荷(线路)侧刀闸 参考答案:B