题目内容
The shutter generally consists of two parts, the front curtain and the rear curtain
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The faster the shutter speed relative to the moving object, the more （）the moving object is.
The shutter speed determines the clarity or blur of moving objects in the photo
For 135-frame cameras, the lens with a （）focal length of mm is generally called a standard lens (b)
The larger the focal length, the narrower the field of view
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