2. 考研
  3. Lighting levels are carefully controlled to fall within an acceptable level for optimal reading convenience.

Lighting levels are carefully controlled to fall within an acceptable level for optimal reading convenience.

admin2010-01-13  94
问题 Lighting levels are carefully controlled to fall within an acceptable level for optimal reading convenience.
选项 A、ideal
B、required
C、optional
D、standard
答案A
解析 ideal理想的；  required要求的：optional选择的：standard标准。因为optimal意为“最优化的”，故选A项。
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