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Lucy: OK!
Li Yang: Wow! So many animals!
Lucy: Look! 2．
Li Yang: How many lions and tigers can you see?
Lucy: 3．
Li Yang: 4．
Lucy: 5．
Li Yang: Let me count! There are six parrots in the tree.
| A．How many parrots are there in the tree? |
| B．Let's go to the zoo! |
| C．All of them are running happily. |
| D．There are many lions and tigers. |
| E．Ten lions and five tigers. |
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
