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Simon: What's this?
Daming: It's a photo of the Tianshan Mountain. It's very long.
Simon: 1．
Daming: It's about two thousand and five hundred kilometres long.
Simon: 2．
Daming: It's in Xinjiang.
Simon: 3．
Daming: It's very big. 4．
Simon: Wow! How big it is!
Daming: 5．
| A．How big is it? |
| B．I will visit Xinjiang someday. |
| C．How long is it? |
| D．It's about 570,000 square kilometres. |
| E．Where is it? |
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
