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【多选题】
在估计样本含量时需注意A.
选择恰当计算方法
B.
多种样本估计方法相结合
C.
减少单位的个体变异
D.
尽量选择总体单一
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举一反三
【单选题】'Bridging the gap'(Line 1 ,Para. 4) is used in the passage to refer to ______.
A.
teaching old people more information about the modern technology
B.
asking young generation to get used to the traditional ways of communication
C.
using modern technology to invent easy ways to communicate for old people
D.
neglecting the difference between young and old generations in communication
【简答题】(Para. 1) misdemeanor
【单选题】The word 'confine' (Line 1. Para. 4) most probably means ______.
A.
controlled
B.
defined
C.
restricted
D.
forgiven
【单选题】The expression 'out-of-the-box'(Line 1. Para. 4) most probably means______.
A.
traditional
B.
logical
C.
invariable
D.
inspirational
【简答题】(Para. 2) ___________________________________________________________。
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