搜索
We see many things like colors, lights, buildings with our eyes. But can you protect（保护）your eyes well?
Let eyes have a good rest. Many people need to look at a computer when they work or study. That puts a lot of pressure（压力）on their eyes. So every 20 minutes, you should let your eyes have a good rest for around 20 seconds.
Wear a sun hat or sunglasses. There are some bad rays from the sun. They can be bad for eyes, so it’s best to get in the habit of protecting them from an early age.
Have eye-friendly food. You can also protect your eyes by eating some eye-friendly food.
Have a good sleep.
| A．Green vegetables and fish are good to keep your eyes healthy. |
| B．Wearing a sun hat or sunglasses is the best way to protect your eyes. |
| C．Here are some ways about how to protect your eyes. |
| D．You should have a good sleep at night. |
| E．You should look out of the window when you have a rest. |
| F．So start exercising before it’s too late. |
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
