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.

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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，完美的”；required“必需的，要求的”；optional“随意的，可选择的”；standard“标准的，权威的”。调节灯光的照明度以方便怎么样的阅读，可以推测optimal意为“最佳的，理想的”，ideal与之意思相近，故选A。
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