A.31∶9 | B.12∶1 | C.7∶2 | D.4∶1 |
A.7:10 | B.3:5 | C.4:7 | D.5:7 |
A、B两种商品原来的价格之比为7∶3.现在如果将它们的价格都分别上涨70元,新的价格之比为7∶4,这两种商品原来的价格各是多少元?
A.100 |
B.80 |
C.90 |
D.132 |
A.1.7,1.0 |
B.1.6,1.1 |
C.1.5,1.2 |
D.1.4,1.3 |
A.20 |
B.30 |
C.50 |
D.40 |
A.9 | B.10 | C.11 | D.12 |
A.7:9 | B.9:l | C.9:6 | D.9:7 |
A.5:4 | B.4:5 | C.1:9 | D.9:1 |