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简答题已知关系模式：学生关系S（SNO，SNAME）。SNO为学号，SNAME为姓名。课程关系C（CNO，CNAME，CTEACHER）。CNO为课程号，CNAME为课程名，CTEACHER为任课教师。选课关系SC（SNO，CNO，SCGRADE）。SCGRADE为成绩。写出没有选修过“李明”老师讲授课程的所有学生姓名的SQL语句。

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Many students find the experience of attending university lectures to be a confusing and frustrating experience. The lecturer speaks for one or two hours, perhaps (67) the talk with slides, writing up important information on the blackboard, (68) reading material and giving out (69) . The new student sees the other students continuously writing on notebooks and (70) what to write. Very often the student leaves the lecture (71) notes which do not catch the main points and (72) become hard even for the (73) to understand. Most institutions provide courses which (74) new students to develop the skills they need to be (75) listeners and note-takers. (76) these are unavailable, there are many useful study-skills guides which (77) learners to practice these skills (78) . In all cases it is important to (79) the problem (80) actually starting your studies. It is important t (81) that most students have difficulty in acquiring the language skills (82) in college study. One way of (83) these difficulties is to attend the language ,and study-skills classes which most institutions provide throughout the (84) year. Another basic (85) is to find a study partner. (86) it is possible to identify difficulties, exchange ideas and provide support.

A. assignments
B. information
C. content
D. definition

简述职业生涯发展的主要阶段。

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预计某宗房地产未来第一年的净收益为38万元，此后每年的净收益将在上一年的基础上减少3万元，则该宗房地产的合理经营期限为12年。( )

A. 对
B. 错