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Amy: It’s on 21st April.
Tom: When’s Earth Day?
Amy:
Tom: Let’s do something to protect our Earth.
Amy: OK. Look!
Tom: That’s a good idea. .
Amy: Really? How can we reuse them?
Tom:
Amy: You’re right. Let’s do it.
| A．There are some bottles on the ground. |
| B．We can also reuse these bottles. |
| C．It’s on 22nd April. Tomorrow is Earth Day. |
| D．We can make toys with these bottles. |
| E．What date is it today? |
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
