In the absence of visual cues, the resting focal length of the eye is approximately? （0.5分）
举一反三
- The depth of field depends on ______. A: aperture B: the distance between camera and subject C: the size of the subject D: the focal length of the lens
- The focal length of the lens is more suitable for shooting close-up portraits is _____. A: 24~105mm B: 24~70mm C: 85~135mm D: 70~200mm
- To operate safely in IMC, a pilot controls the aircraft relying on ______, and ATC provides separation. A: instruments B: senses C: visual cues D: experience
- With good visibility, pilots can determine the attitude of the aircraft by utilizing _______ from outside the aircraft. A: instruments B: sensations C: visual cues D: experience
- Good content should be A: well-structured B: audience-centered C: approporiate in length D: visual aid