①每千克葡萄8.4元,樱桃的单价是葡萄的1.2倍,樱桃的单价是多少?
②每千克葡萄8.4元,樱桃的单价是葡萄的1.2倍,能买多少千克樱桃?
③每千克葡萄8.4元,买1.2千克葡萄多少元?
④每千克橘子1.2元,8.4元能买多少千克橘子?
A.①② | B.①③ | C.③④ | D.②③ |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2