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A. —Happy birthday, Helen.
—Thank you.
—How old are you?
—I’m six.
B. —What time is it?
—It’s five o’clock. It’s time for home.
—Goodbye.
—Goodbye.
C. —Don’t shout in the cinema.
—I’m sorry.
D. —Is this your toy car?
—Yes, it is.
E. —What’s this?
—It’s a cow.
—What are those?
—They’re ducks.
F. —Where’s my picture?
—Look, it’s over there, under the desk.
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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
