最喜欢吃的蔬菜 | 茄子 | 西红柿 | 青菜 | 黄瓜 | 其他 |
男生人数(人) | 5 | 11 | 5 | 4 | 1 |
女生人数(人) | 6 | 6 | 3 | 7 | 2 |
1.全班共有 ( )人。
A.48 | B.49 | C.50 | D.51 |
A.茄子 | B.西红柿 | C.青菜 | D.黄瓜 |
A.1 | B.2 | C.3 | D.4 |
A.4 | B.3 | C.2 | D.1 |
A.6 | B.7 | C.8 | D.9 |

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

