The_efficiency_of_today‚Äö√Ñ√∂‚àö√ë‚àö¬•s_best_solar_cell_is_about$#

The_efficiency_of_today‚Äö√Ñ√∂‚àö√ë‚àö¬•s_bes

1.	The_efficiency_of_today‚Äö√Ñ√∂‚àö√ë‚àö¬•s_best_solar_cell_is_about$#
A.	15-20%
B.	40%
C.	50%
D.	75%
Answer» C. 50%