A.小明买4支钢笔用了18元,小刚想买3支同样的钢笔,要用多少钱? |
B.一辆汽车8小时行驶了252千米,照这样计算,10小时行驶多少千米? |
C.一项修路工程,A修路队独做要13天,B修路队独做要15天,两队合做多少天能完成? |
D.一本书,如果每天读30页,12天可以读完,如果想10天读完,每天要读多少页? |
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