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【判断题】
相关研究表明,人越处在高恐惧情景中,越倾向于希望独处。
A.
正确
B.
错误
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【简答题】Mrs. Green is going to give a birthday party for her daughter Jenny. Jenny is going to be twelve years old.  A lot of Jenny’s friends are going to come to the party. Mrs. Green is getting readay for t...
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A.
平均数
B.
平均误
C.
平均次数
D.
平均值
【单选题】Mrs. Green always helps her mother even though going to work _________most of her day.
A.
takes out
B.
takes down
C.
takes up
D.
takes off
【简答题】一组数据前3个数的平均数是8,中间4个数的平均数是6,后5个数的平均数是6,则这组数据的平均数是______.
【单选题】Mrs. White as well as her twins ______ the dancing club. [     ]
A.
is going to, join
B.
is going to, join in
C.
are going to, join
D.
are going to, join in
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【简答题】一组数据前3个数的平均数是8,中间4个数的平均数是6,后5个数的平均数是6,则这组数据的平均数是(    )。
【单选题】一组数据中每个数据都减去80构成一组新数据,这组新数据的平均数是1.2,方差是4.4,则原来这组数的平均数和方差分别是(  )
A.
81.2,,84.4
B.
78.8,,4.4
C.
81.2,,4.4
D.
78.8,,75.6
【单选题】He told you Mrs. Smith wasn't going to the meeting, _____?
A.
was she
B.
did he
C.
wasn't she
D.
didn't he
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