单项选择题

A．Castles’’ structure and the eating habit in them.
B．Castles’’ structure and the people who lived in them.
C．Castles’’ structure and the life in them.
D．Why people built castles and their structure.
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填空题
A．lengthB．intervalC．periodD．meantime
单项选择题
What was the main concern of industrialists before the marketing concept was widely accepted
A．The needs of the market.
B．The preferences of the dealer.
C．The efficiency of production.
D．The satisfaction of the user.
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