The value of time

To realize the value of one year,

Ask a student who has failed a final exam.

To realize the value of one month,

Ask a mother who has given birth to a premature (早产的) baby.

To realize the value of one week,

Ask an editor (编辑) of a weekly newspaper.

To realize the value of one hour,

Ask the lovers who are waiting to meet.

To realize the value of one minute,

Ask a person who has missed the train, bus or plane.

To realize the value of one second,

Ask a person who has survived (幸存) an accident.

To realize the value of one millisecond,

Ask the person who has won a silver medal (银牌) in the Olympics.

Time waits for no one.

Treasure (珍惜) every moment you have.

下面是一幅中国古代行政区划示意图。此图反映的行政区划出现于（    ）

• 分子的无规则运动跟 ____有关，这种运动叫 ____运动； ____ 越高， 运动越激烈。