题目

【小题1】This notice is ______.A. telling students about the final exam dateB. telling students about the winter holiday dateC. informing students about a lecture during the weekD. informing students about preparing lectures for next week【小题2】Who is visiting the Foreign Language Department this week?A. A Professor of Classic American LiteratureB. A Professor of Intelligence TechnologyC. A Professor of Chinese HistoryD. A Professor of Geography【小题3】When can the students go to the lecture?A. On Dec 13, 2016, at 2 pm. B. On Dec 14, 2016, at 3 pm.C. On Dec 15, 2016, at 3 pm. 7．已知△ABC的三个顶点为A（2，0），B（0，-6），C（-1，4）（1）分别求边AB，BC，AC所在直线的方程；（2）求AB边上中线CD所在直线的方程．