A. Only at the zoos. B. Only on the road.
C. Everywhere outside the cities and towns.
A. They have strong legs. B. They have strong tails. C.BothAandB.
A. They are good at jumping. B. They are good at dancing. C. They are good at running.
A. On their feet. B. On their legs. C. On their tails.
A. They keep their babies safe in the hole.
B. They keep their babies safe in their pouches(育儿袋).
C. They keep their babies safe in the tree.
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