本题目来源于试卷: Physics Unit25: Optical Instruments，类别为 国际高中通用物理
[单选题]
In a single-lens reflex camera the +,,q2;old*brlmo,wa k/qd s 3vfwr,pb2(hzilens-film gl1*+c/3 pctdo7r tx bdistance may be varied by sliding the lens forward or backward with respect to the camera housing. If, with such a camera, a fuzzy picture is obtained, thgcl7o1p/ xt+c*d3b tr is means that
A. the lens was too far from the film.
B. the lens was too close to the film.
C. too much light was incident on the film.
D. too little light was incident on the film.
E. none of the given answers
参考答案: E
本题详细解析:
暂无
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