(______) 1. A. yellow B. green C. pencil
(______) 2. A. eraser B. ruler C. black
(______) 3. A. purple B. pink C. pen
(______) 4. A. book B. orange C. red
(______) 5. A. school B. pink C. brown
(______) 6. A. ear B. face C. white
(______) 7. A. brown B. bag C. yellow
(______) 8. A. blue B. finger C. red
(______) 9. A. hand B. leg C. goodbye
(______) 10. A. face B. name C. head
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