[填空题]
A magnifying glass is j nwlczc)5v juuwcaz 2:*:,tl4c. 9jcrad)gi1 :cf vjo:ted at $3.0\times$ for a normal eye that is relaxed. What would be the magnification of this lens for a relaxed eye whose near point is
(a) 55 $cm$, = $\times$
(b) 16 $cm$? Explain the differences. = $\times$
