2. 外语
  3. Another factor in the display of art objects Aconcerns their continued preservation. Because of the sensitivity of some of the m

Another factor in the display of art objects Aconcerns their continued preservation. Because of the sensitivity of some of the m

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问题 Another factor in the display of art objects Aconcerns their continued preservation. Because of the sensitivity of some of the materials Bused in their creation, it is necessary to control Cwithin narrow limits the temperature, humidity, and lighting Dwhich they are exposed.
选项
答案D(改为：to which)
解析 此处考查的是词组expose to，意思是“使易受，使受”。引导定语从句时，to提前，用to which。
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