①买6本相同的练习本需要9.6元,每本练习本多少钱?
②一只蜗牛6分钟爬行9.6米,照这样计算,它每分钟爬行多少米?
③一只蜗牛6分钟爬行9.6米,照这样计算,它每爬行1米需要多少分钟?
④一只鹅重9.6千克,是一只小鸡质量的6倍,这只小鸡重多少千克?
A.①②③ | B.②③④ | C.①③④ | D.①②④ |
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