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【单选题】
已知甲乙两个总体的平均数分别为200单位和100单位,它们的标准差分别为15和8,则两个平均数的代表性A.
甲大于乙
B.
甲小于乙
C.
甲等于乙
D.
不能确定
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反馈参考答案：
举一反三
【单选题】SQL Server为每个触发器创建了两个临时表,他们是( )
A.
inserted和updated
B.
inserted和deleted
C.
updated和deleted
D.
selected和inserted
【单选题】I hadn’t intended to get much from the business I ran the first year, while it _____ so well.
A.
went out
B.
carried out
C.
made out
D.
turned out
【单选题】---You were out when I went to your house this morning. ---Oh, I _______ for a friend from England at the airport.
A.
was waiting
B.
waited
C.
am waiting
D.
have waited
【单选题】Every day after I went home, if not _______ from work, I will go out for a walk with my wife.
A.
tiring
B.
to be tire
C.
tired
D.
being tired
【单选题】SQL Server为每个触发器创建了两个临时表,它们是( )。
A.
Updated和Deleted
B.
Inserted和Deleted
C.
Inserted和Updated
D.
Seleted和Inserted
【单选题】SQL Server为每个触发器创建了两个临时表是( )。
A.
SELECTED和DELETED
B.
DELETED和UPDATED
C.
INSERTED和UPDATED
D.
INSERTED和DELETED
【单选题】—Have you ever heard from your aunt since she went to Hongkong? —Yes, I've just got a letter from _____. [ ]
A.
her
B.
hers
C.
she
D.
herself
【单选题】--- You were out when I went to visit you yesterday. ---Oh, I________ for a friend from England at the airport.
A.
was waiting
B.
had waited
C.
am waiting
D.
have waited
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