单项选择题


A．By
B．Through
C．With
D．Obtaining
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单项选择题
A．screens fromB．screens outC．screens ofD．screens about
A．screens from
B．screens out
C．screens of
D．screens about
单项选择题
Counting is different from number sense in that counting is ______.
A．dependent on simpler mental activity
B．a kind of ability possessed by man
C．found in animals as well as man
D．the ability to distinguish differences in small sets of objects
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