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Question

A photo printing room needs darkness and diffused sunlight in two different cases. The suitable material for windows of the room can be ______ and ______ , respectively.​

A
opaque; translucent​
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B
opaque; transparent​
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C
transparent; translucent​
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D
transparent; transparent​
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Solution

The correct option is A opaque; translucent​
To keep the room dark, the light from the surrounding need to be blocked. So the window must be made up of opaque material.
On other side, for the room to receive diffused sunlight, the windows should be made up of translucent material.
So the correct option is C.

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