(1)A. tall B. tail C. taller
(2)A. speak B. sneakers C. skate
(3)A. foot B. food C. fruit
(4)A. west B. best C. next
(5)A. play B. playing C. plane
(6)A. shoes B. shorts C. short
(7)A. do B. does C. did
(8)A. skating B. swimming C. ice-skating
(9)A. day B. date C. boy
(10)A. take B. took C. taking
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