题目内容

The shutter speed determines the clarity or blur of moving objects in the photo

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For 135-frame cameras, the lens with a （）focal length of mm is generally called a standard lens (b)

A. 85mm
B. 50mm
C. 35mm
D. 200mm

The larger the focal length, the narrower the field of view

When evaluating a lens, what are the general attributes

A. Maximum aperture
B. Center resolution
C. distortion
Dispersion

者，属太阴，以其脏有寒故也，当温之，宜服。