China Naming Network - Ziwei knowledge - In 2006, Shenyang's urban ambient air quality reached the best level ever recorded, and the number of excellent weather days ranked ninth among cities above the sub-provincial level in China.
In 2006, Shenyang's urban ambient air quality reached the best level ever recorded, and the number of excellent weather days ranked ninth among cities above the sub-provincial level in China.
Solution: (1) In 2003, 45%;
(2) From Figure ①, it can be concluded that
162+204+295+30 1+3 17+32 1= 1600
30 1÷ 1600≈0. 19= 19%
32 1÷ 1600≈0.20=20%
∴ 19% in 2004 and 20% in 2006.
Correctly complete the statistical chart:
;
(3) "ellipsis" (the answer is not unique).