5.0以上 | 4.9~4.7 | 4.6~4.3 | 4.2以下 | |
一年级一班 | 29 | 11 | 5 | 2 |
四年级二班 | 27 | 12 | 6 | 3 |
六年级一班 | 18 | 20 | 5 | 5 |
①一年级5.0以上有
②六年级5.0以上有
③四年级4.2以下有
④六年级
⑤5.0的视力是正常的,低于5.0的一年级的有
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