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Weiwei: Let’s go to the zoo on Sunday.
Duoduo: 1．
(at the zoo)
Duoduo: Look at the tigers. 2．
Weiwei: They are sleeping.
Duoduo: Wow! Look at that elephant. 3．
Weiwei: It’s playing with water.
Duoduo: Look at the panda. What is it doing?
Weiwei: 4．
Duoduo: I like pandas very much.
Weiwei: 5．
| A．It’s eating bamboo. |
| B．What are they doing? |
| C．Good idea! |
| D．Me too. |
| E．What is it doing? |
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
