第23题: [多项选择]亲爱的库克先生： 您的《英语语法研究》一书给我们英语系教师留下了深刻的印象，并很有兴趣聆听您对这个问题的见解。请您在方便时来我系讲座，您的差旅费和其它费用由我们负担，请告诉我们您是否来讲述并说明时间。 参考答案: Department of English Foreign Studies University, Tianjin June AF,AIII Mr. David Crook Beijing University Beijing, China
Dear Mr. Crook, The teachers of English in our department are deeply impressed by your "A Study of English Grammar" and very interested in hearing in person your ideas on the subject. Would you please come to our department at your convenience Of course, you would receive our honorarium to cover your travelling and other expenses. Please let us know if you can come and tell us when you would be able to do so. Sincerely yours, Wang Li
第24题:[多选题]变压器复压过流（方向）保护技术原则包括 A. 高（中）压侧复压元件由各侧电压经“或门”构成； B.低压侧复压元件取本侧（或本分支）电压； C.低压侧按照分支分别配置电抗器时，电抗器复压元件取本分支电压，否则取两分支电压 D.在电压较低的情况下应保证方向元件的正确性，可通过控制字选择方向元件指向母线或指向变压器 参考答案:ABCD
