北回归线自西向东穿过的省级行政单位依次是（ ）

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).

早上，小红去上学，刚走出家门，便看到一只小鸟在空中来回盘旋，她停下观察，原来小鸟欲飞进某一户人家，那栋楼共6层，每层都有一户开着窗户，小鸟飞进5楼的概率为____ 

土地改革之后，接着我国又对农业、手工业、资本主义工商业进行了社会主义改造，被称为“三大改造”，其中对农业的改造途径是（    ）