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A: What are you doing?
B: 1．.
A: Can you tell me something about Christmas?
B:2．on Christmas morning, We open our gifts. Santa Claus puts gifts under the Christmas tree.
A:3．.
B: Santa Claus is a kind man and he loves Children.
A：Ha-Ha.4．.
A. That's funny. B. I'm making a Christmas card.
C. Christmas is a big holiday. D. Who is Santa Claus?
A. That's funny. B. I'm making a Christmas card.
C. Christmas is a big holiday. D. Who is Santa Claus?
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
