1.What is he doing?
A.He is a teacher. |
B.He is handsome. |
C.He is telling a story. |
A.Yang Ming is watching them. |
B.Mary is watching them. |
C.Yang Ming and Mary are watching them. |
A.You are singing. |
B.I am singing. |
C.He is singing. |
A.Wow! What a beautiful song! |
B.I don’t know. |
C.I’m sorry. |
A.I am wearing a hat. |
B.He is wearing a hat. |
C.He want to wear a hat. |
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同类型试题
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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
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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
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