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【单选题】
Which of the following is implied in the passage?A.
The study of language is the same as the study of anthropology
B.
The study of language has reinforced anthropologists in their view that there is no hierarchy among cultures.
C.
The study of languages has discredited anthropological studies
D.
The study of languages casts a new light upon the claim of anthropologists
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举一反三
【单选题】关于光圈，下列说法正确的是（ ）
A.
光圈的大小用光圈系数表示，等于镜头的焦距/光圈口径
B.
光圈系数越大，通光口径越大，进入光圈的光线就越多
C.
光圈有档位，光圈值相邻两数之间错一档，即F2比F2.8低1档
D.
数码相机中能设置的光圈值均是固定的和标准的