(1)A. mum B. mother C. father
(2)A. pencil B. pen C. purple
(3)A. look B. book C. sick
(4)A. above B. five C. seven
(5)A. seventy B. sixty C. fifty
(6)A. bear B.bird C.bread
(7)A. blue B.black C. brown
(8)A.ball B. doll C. below
(9)A. name B. classroom C. arm
(10)A. old B. cold C. coat
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