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B: 1．
A: No, it isn't. It's my brother's.
B: Look, what's that under the chair?
A: 2．
B: Is it your ball?
A: No, my ball is red. 3． It's my sister's.
B: 4．
A: Oh, yes. Thanks. 5．
B: OK.
| A．Let's go and play. |
| B．Is it your ball? |
| C．Look, your ball is in the desk. |
| D．It's a ball. |
| E．But it's green. |
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
