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A Raindrop
One raindrop(雨滴) falls from a cloud. Two raindrops, three raindrops fall, and then too many raindrops fall. The raindrops run down a hill into a stream(小溪). The stream joins a river. The river grows bigger and bigger. It flows into a large blue sea. The sun comes out and warms the sea. Moist(潮湿的) air rises(升起) from the sea. It rises higher and higher into the sky and forms(形成) a cloud. The cloud grows heavier and heavier. One raindrop falls from a cloud. Two raindrops, three raindrops, and then too many raindrops to count.
| smaller heavier bigger higher |
1．A river is
2．A river is
3．Moist air rises
4．The cloud grows
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
