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（1）A.swing B.soup C.sing
（2）A.arm B.ice C.idea
（3）A.hobby B.heavy C.hole
（4）A.down B.dance C.door
（5）A.forest B.first C.floor
（6）A.beside B.behind C.between
（7）A.soft B.soup C.sing
（8）A.horse B.house C.mouth
（9）A.in your class B.in your glass C.in your box
（10）A.play table tennis B play the violin C.play the piano
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
