一个分数的分子是最小的奇质数，分母是最小的偶合数，这个分数就是____。

“未来两天内将有寒潮影响本市，气温下降6℃～8℃，提醒市民注意增添衣服，预防感冒”。这说明天气与什么密切相关（    ）

Boys and girls,

Attention, please! Do you know 1to keep safe in our daily（日常的）life? Today I’d like2 you some ways to keep safe.

1  Always play in a 3 place. A park is a safe place4 there are no cars or buses in it.

2  5 the traffic rules, please! Before crossing a road,6 and look both ways ——look left, look right and look left 7.

3  Never put your head or hands 8 a car, a bus or a train. Many people get 9 or lose their lives by doing so.

4  Don’t 10 a stranger（陌生人）or go with him/her.

That’s all. All the students should obey the rules anytime(任何时候).