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【单选题】
对最小组下限或最大组上限的频数分布资料集中趋势描述可用( )。A.
算术平均数
B.
调和平均数
C.
中位数
D.
几何平均数
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反馈参考答案：
举一反三
【单选题】The story was about the passengers' experience on the train from St. Albans to Farringdon _______ Wednesday 9th December 2009.
A.
in
B.
on
C.
at
D.
with
【简答题】He was (patience) ______ waiting for his wife, because the train was about to leave.
【单选题】The train was about to leave and I was not even on the _______ .
A.
platform
B.
pedagogue
C.
involves
D.
group
【单选题】He said the train ________ at six the next morning. [ ]
A.
was leaving
B.
was about to leave
C.
should leave
D.
left
【单选题】The train was about to leave and I was not even on the ______.
A.
board
B.
terminal
C.
platform
D.
taste
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