题目内容

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

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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。

太阳阳明者，是也；正阳阳明者，是也；少阳阳明者，发汗利小便已，胃中燥烦实，__ 是也。