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A: What’s this?
B: It’s a ball.
A: Is this your ball?
B: Yes, it is.
A: Here’s your ball.
B: Thank you.
1．
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B: It’s a
A: Is this your
B: Yes, it
A: Here’s your
B: Thank you.
2．
A: What
B: It’s
A: Is this
B: Yes,
A: Here
B: Thank you.
3．
A: What
B: It’s
A: Is
B: Yes,
A: Here
B: Thank you.
4．
A: What
B: It’s
A: Is
B: Yes,
A: Here
B: Thank you.
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
