【判断题】方差分析是为了推断多个总体的方差是否相等而进行的假设检验。
【单选题】—Lucy, I hear the new TV tower is fantastic. Could you tell me ________? —Sure! Take No. 8 bus. It's not far. [ ]
D.
which bus should I take
【简答题】根据汉语提示完成句子。 1.They (表演) an English short play for us tomorrow. 2. Could you tell me the best way (筹款)? 3. The students will (决定) the way to travel. 4. Kate will go on the (野外旅行) with her friends tomor...
【简答题】This coat is very cheap. I ____ (take) it now. 7. I ́ll tell him about it when he ____ (come) back. 8. Could you tell me how .I ____(can get) to No 3 Middle school. 9. He ____ said that the new teache...
【简答题】Could you tell me how .I ____(can get) to No 3 Middle school. 9. He ____ said that the new teacher ____ (give) the students an English lesson now. 10. I ____ (milk) a cow three times.
【简答题】自发的氧化还原反应可以设计成原电池。若利用反应“Cu+2Ag + =2Ag +Cu 2+ ” 设计一个原电池,回答下列问题: ①该电池的负极是__________,正极上反应的离子是________。 ②在外电路中,电子流动方向从_________极流向________极(填“正”或“负”)。内电路中,阳离子移向_______(填“正极”或“负极”)。
【单选题】有关系S(S#,SNAME,SEX),C(C#,CNAME),SC(S#,C#)。其中S#为学生号, SNAME为学生姓名,SEX为性别,C#为课程号,CNAME为课程名。要查询选修“计算机”课的全体女学生姓名的SQL语句是“SELECT SNAME FROM S,C,SC WHERE”子句。这里WHERE子句的内容是
A.
S.S#=SC.S# AND SEX='女' AND CNAME='计算机'
B.
S.S#=SC.S# AND C.C#=SC.C# AND CNAME='计算机'
C.
SEX='女' AND CNAME='计算机'
D.
S.S#=SC.S# AND C.C#=SC.C# AND SEX='女' AND CNAME='计算机'
【单选题】关系S(S#,SNAME,SEX),C(C#,CNAME),SC(S#,C#)。其中S#为学生号,SNAME为学生姓名,SEX为性别,C#为课程号,CNAME为课程名。要查询选修“计算机”课的全体女学生姓名的SQL语句是SELECT SNAME FROMS,C,SCWHERE子句。这里WHERE子句的内容是( )。
A.
S,S#=SC.S#AND SEX=“女”ANDCNAME=“计算机”
B.
S,S#=S C.S#AND C.C#=S C.C#AND CNAME=“计算机”
C.
SEX=“女”AND CNAME=“计算机”
D.
S.S#=S C.S#AND C.C#=S C.C#AND SEX=“女”AND CNAME=“计算机”