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Chengcheng: Excuse me. 1．
Feifei: Really? 2．
Chengcheng: It’s blue and red.
Feifei: OK. 3．
Chengcheng: A ruler, two toys and some books.
Feifei: 4．
Chengcheng: Yes, it is.
Feifei: Here you are.
Chengcheng: 5．
| A．Is this your bag? |
| B．Thank you so much. |
| C．What colour is it? |
| D．I lost my schoolbag. |
| E．What’s in 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
