单项选择题

If a country wants to develop its economy successfully, there has to be a clear()of its social needs.

A. assessment
B. assumption
C. assurance
D. appreciation

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单项选择题
In the Spring Export Commodities Fair the () of fine china attracted much attention of customers from all over the world.

A. succession
B. array
C. string
D. cluster
单项选择题
When light illuminates an object, part of it is absorbed and part reflected; the () lightness of an object depends on the proportion of light that is reflected.

A. denoted
B. embodied
C. insulated
D. perceived
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