搜索
A little ant (蚂蚁) is very thirsty. He would like some water to drink. He sees a small river. He’s very happy. But he can’t drink the water. And he falls into the water. He is afraid because he can’t swim. A bird is flying above the river. She sees the little ant. She quickly throws a leaf (树叶) to the water. The little ant climbs on the leaf.
1．The little ant wants some water.2．The ant falls into the water.
3．The little ant can swim.
4．The bird is standing in the tree.
5．The bird is helpful.
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
