第10题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. Pop music. B. Folk music. C. Classical music. D. All kinds of music. 参考答案:A 答案解析:[听力原文]
W:I enjoy all kinds of music.What kind of music do you like
M: Folk music has appealed to
第20题:[多选题] 电感线圈产生的自感电动势对电流所产生的阻碍作用称为线圈的电感电抗,简称感抗;其性质是:交流电的频率越高,感抗就越大。直流容易通过电抗,交流不易通过电抗;求解公式:XL=ωL=2πfL ,式中:(____)。 A. XL—感抗,单位:欧姆Ω B. ω— 角频率,单位是:rad/s C. L— 线圈电感,单位是:H D. f— 频率,单位是:Hz 参考答案:ABCD