第9题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. Teacher. B. Dentist. C. Flight attendant. D. Tour guide. 参考答案:B 答案解析:[听力原文]
M: Do you brush at least three times a day
W: No, only once a day. You mean, that’s where
第10题:[单选题]轻瓦斯动作后,( )。 A. 跳开变压器高压侧断路器 B. 跳开变压器低压侧断路器 C. 只发信号,不跳开关 参考答案:C