Cows Affect Earth’s Climate
Many scientists believe that Earth is slowly heating up and that greenhouse gases are a likely cause. These gases create a “b
The problem with greenhouse gases is that their molecules (分子) easily absorb radiation (热辐射) from the sun, and they hold onto the radiation. Methane is a particularly problematic gas because each of its molecules traps t
Many people believe that cows are adding more pollution to the environment than cars, surprisingly. When an animal eats, bacteria b
Although these facts are startling, there is hope that we can cut down on the amount of methane gas. E
If people rely on this seaweed as a final s
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