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Mrs Wang: Good afternoon, class.
All: Good afternoon, Mrs Wang.
Mrs Wang: Ben, open the window, please. It’s so hot.
Ben: Yes, Mrs Wang.
Mrs Wang: Open your books, please.
All: All right.
Mrs Wang: Who can read the numbers?
David: I can, Mrs Wang. One, two, three... nineteen, twenty.
Mrs Wang: Yes, you’re right. Very good.
1．It is in the morning.
2．They are in the classroom.
3．Ben can read the numbers.
4．Mrs Wang is a Music (音乐) teacher.
5．Ben opens the window because (因为) it’s cold.
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
