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| A．are | B．have | C．does |
| A．do | B．eat | C．does |
| A．firecrackers | B．trees | C．flowers |
| A．Hello | B．Happy | C．Hi |
| A．have | B．is | C．do |
| A．at | B．in | C．on |
| A．tree | B．happy | C．trees |
| A．dinner | B．hair | C．firecrackers |
| A．sing | B．play | C．eat |
| A．watch | B．dancing | C．songs |
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
