How would you like to live in a land where the sun shines day and night? There are place in the polar regions where, for North, the sun never sets! This is known as the land of the Midnight Sun. This period of sunlight can last up to six months.

This happens because the Earth tilts(倾斜). When the North Pole is tilted towards the sun, it has constant (不断) daylight. As the same time, the South Pole is tilted away from the sun. It is in darkness.

Six months later, the South Pole tilts to the sun and has constant daylight. Then the North Pole is tilts away. It has darkness.

小题1: Where can you see the Midnight Sun?

小题2:How long can the period of sunlight last?

小题3:Why can we see the Midnight Sun?

小题4:When there is Midnight Sun in the North Pole?

小题5:What happens in the South Pole?

在福建平漳综合试验区建设和发展过程中，要坚持经济建设与环境保障并重，实现经济可持续发展。以下建设符合上述要求的有（）

1、重点发展以高科技为特征的新兴产业

2、实验区建设以开发为主，注重经济效益

3、充分利用其丰富的风力资源，发展风电产业

4、把增加物质资源作为其经济发展的主要方式

A、1；3

B、1；2

C、2；4

D、3；4