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[[QOrDeR]]—What is the boy doing?
—_____
| A．He is reading. |
| B．He is drawing. |
【小题2】He is _____.
| A．swimming |
| B．swiming |
【小题3】—Is he jumping?
—_____
| A．Yes, he is. |
| B．No, he isn’t. |
【小题4】This is the _____.
| A．bathroom |
| B．bedroom |
【小题5】Listen! He is _____.
| A．singing |
| B．sing |
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
