 
			 
			MCQOPTIONS
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				| 1. | If flying height of a spacecraft is H, the length of air base is B and the parallax difference betweentwo points is dp, then the difference in height | 
| A. | h = dp/(b/h) | 
| B. | h = (b/h) dp | 
| C. | h = dp/(h/b) | 
| D. | h = (h/b) dp | 
| Answer» B. h = (b/h) dp | |