单项选择题

A．proportion
B．percentage
C．rate
D．ratio
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单项选择题
What is the color code of the shelves where normal size novels are placed
A．Blue
B．Red
C．Yellow
D．White
单项选择题
If you want to look up a word in a dictionary, which floor would you go to ______.
A．Ground floor
B．First floor
C．Third floor
D．Fourth floor
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