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一、以下各题所列答案中只有一个是正确的.把正确答案前面的字母填在题后的括号内(共12分,每小题3分). 1.许多照相机镜头到胶片的距离是可调的.某次拍摄前摄影师已经把相机“调焦”,使被摄者在胶片上形成了清晰的像.如果在拍摄前被摄者移动了位置,他和摄影者的距离变大,为使他在胶片上仍然形成清晰的像,镜头与底片的距离应该
1. Only one of the answers listed in the following questions is correct. Put the letters in front of the correct answer in brackets (12 points in total, 3 points per question). 1. The distance from the camera to the film is many. Adjustable. Before a certain shot, the photographer has “cameraed” the camera so that the subject forms a clear image on the film. If the subject moves the position before shooting, the distance between the photographer and the photographer becomes larger. In order to make him still form a clear image on the film, the distance between the lens and the film should be