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At home
Mum: Betty, your schoolbag is broken!
Betty:
At the Department Store
Mum: This schoolbag is nice.
Betty:
Mum: How about this green one?
Betty: I like this red one better.
Mum: OK. It’s small and light.
Betty:
Mum: How much is it?
Sales assistant: It’s 56 yuan.
Mum:
| A．Thank you, Mum. |
| B．Yes, it’ll be easy for me to carry. |
| C．I’ll buy you a new one. |
| D．But it’s heavy. |
| E．We’ll take 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
