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近年来，学生意外伤害事故频发，给许多家庭带来永久的伤痛。作为中学生，我们该如何有效的自我保护，免受伤害呢? 我市正在举行以“How to Keep Safe”为题的中学生安全知识英语征文比赛，请你根据下表提示，写一篇短文参赛吧。
| How to Keep Safe | |
| Traffic | traffic lights, electric bikes（电动车）… |
| Swimming | rivers, swimming pool… |
| Internet | ID number, code(密码）, unhealthy websites… |
| …… | …… |
要求：
1.短文必须包含提示中所有内容，并适当发挥；
2. 语句通顺，意思连贯，语法正确，书写规范；
3. 文中不得出现真实人名、校名或地名；
4. 词数：80-100（开头和结尾已给出，不计入总词数）。
How to Keep Safe
Do you know that many dangerous things will happen if we are not careful enough? As a student, how to keep safe is very important.
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After all, life is very important. We should learn something about self-protection so that we can protect ourselves well.
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
