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A: Hello, Jack! I have a new schoolbag.
B: Really?
A: Look. 1．
B: How beautiful! 2．
A: My aunt, Lily. And she also bought me some crayons.
B: 3．
A: Let me count. One, two, three, four... twenty-four crayons.
B: 4．
A: Yes. 5．
B: Great!
| A．Who bought it for you? |
| B．Oh, there are twenty-four crayons. |
| C．It's black and white. |
| D．Let's draw picture, OK? |
| E．How many crayons? |
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
