______are the possible courses of action from which choices can be made.A. AlternativesB. AlternatesC. AlternationsD. Alternators
______are the possible courses of action from which choices can be made.
A. Alternatives
B. Alternates
C. Alternations
D. Alternators
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现有3个表Students(SID，SN，SEX，AGE，DEPT)，Courses(CID，CNAME)，SCORE(SID，CID，GRADE)。 其中，SID为学号，SN为姓名，SEX为性别，AGE为年龄，DEPT为系别，CID为课程号，CNAME为课程 名，GRADE为成绩。检索“王华”同学所选修的课程名称和成绩，正确的SELECT语句是（ ）。A. SELECT CNAME，GRADE FROM Students INNER JOIN SCORE ON Students．SID=SCORE．SID INNER JOIN Courses ON SCORE．CID=Courses．CID WHERE SN=’王华’B. SELECT CNAME，GRADE FROM Students INNER JOIN Courses ON Students．SID=Courses．CID WHERE SN=’王华’C. SELECT CNAME，GRADE FROM SCORE INNER JOIN Courses ON SCORE．CID=Courses．CID WHERE CNAME=。王华。D. SELECT CNAME，GRADE FROM Students INNER JOIN Courses ON Students．SN=Courses．CNAME WHERE SN=’王华。
Youwillwanttwotreesabouttenfeetapart,from_____tosuspendyourtent.(A)there(C)which(B)them(D)where
You will want two trees about ten feet apart, 选择 Youwillwanttwotreesabouttenfeetapart,from_____tosuspendyourtent.(A)there(C)which(B)them(D)where
【单选题】设置所有课时低于60或者上课人数小于100的课程性质为专业基础课，正确的命令是？A．db.courses.updateMany({$or:[{"credit":{$lt:60}},{"count":{$lt:100}}]},{"课程性质":"专业核心课"})B．db.courses.update({$or:[{"credit":{$lt:60}},{"count":{$lt:100}}]},{"课程性质":"专业核心课"})C．db.courses.update({$or:{[{"credit":{$lt:60}},{"count":{$lt:100}}]},{"课程性质":"专业核心课"})D．db.courses.update({$or:[{"credit":{$lte:60}},{"count":{$lt:100}}]},{"课程性质":"专业核心课"},{multi:true})