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B: Oh!
A:
B: How big is it?
A: It has got more than eight million people.
B: What about Beijing?
A:
B: I know you went to Beijing last year. Did you go to the Great Wall?
A: Of course. This postcard is for you.
B: Thank you. It’s so beautiful. How long is it?
A:
B: How great it is! Thank you so much.
| A．Beijing has got about twenty million people. |
| B．It’s more than twenty thousand kilometers long. |
| C．What a big map of the world! |
| D．It has got the Great Wall on it. |
| E．It’s in the east of the US. |
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
