单选题______Aidea Bconcept Ctrend Dsituation
单选题
______
A
idea
B
concept
C
trend
D
situation
参考解析
解析：
concept概念，观念。此词较为正式。idea想法，主意。trend潮流。situation形势，情况。
concept概念，观念。此词较为正式。idea想法，主意。trend潮流。situation形势，情况。
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