由四舍五入得到的近似数8.31×104精确到______位．

   21世纪人类必须全力注意的六大事项是：(1)核毁灭的威胁；(2)人口过多的危险；(3)全世界环境的退化；(4)发展中国家与工业化国家的差距；(5)对教育系统进行结构性改革的必要性；(6)公共道德和个人道德的沦丧。

Holiday News

Vacancies (空位) now and in the school holidays at a country hotel in Devon. This comfortable, friendly home-from-home lies near the beautiful quiet countryside, but just a drive away from the sea. The food is simple but good. Children and pets are welcome.Reduced prices for low season.

The Snowdonia Center

The Snowdonia Center for young mountain climbers has a mountain 1068.The beginners’ costs are ￡57 for a week, including food and rooms. Equipment is included except walking shoes, which can be hired at a low cost.

You must be in good health and prepared to go through a period of body exercises. This could be the beginning of a lifetime of mountain climbing adventure.

The World Sea Trip of a Lifetime

Our World Sea Trip of 2008 will be unlike any holiday you have ever been on before. Instead of one hotel after another, with all its packing and unpacking waiting and traveling, you just go to bed in one country and wake up in another.

On board the ship, you will be well taken care of. Every meal will be first-class and every cabin like your home.

During the trip, you can rest on deck(甲板), enjoy yourself in the games rooms and in the evening dance to our musical team and watch our wonderful play.

You will visit all the places most people only dream about – from Acapulco and Hawaii to Tokyo and Hong Kong.

For a few thousand pounds, all you’ve ever hoped for can be yours.

小题1: What can you do if you like to go on holidays with pets?

A．Choose the holiday in Devon.

B．Go to the Snowdonia Centre

C．Join the World Sea Trip of 2008

D．Visit Acapulco and Hawaii小题2: In what way is the Snowdonia Centre different from the other two holidays?

A．It provides chances of family gatherings.

B．It provides customers with good food.

C．It offers a sport lesson.

D．It offers comfortable room.小题3: What is special about the World Sea Trip of 2008?

A．You can have free meals on deck every day.

B．You can sleep on a ship and tour many places.

C．You will have chances to watch and act in a play.

D．You have to do your own packing and unpacking.小题4: At the Snowdonia Centre, the beginners’ costs of ￡57 do not cover ______.

A．food

B．rooms

C．body exercises

D．walking shoes

质量体系审核

日光石具有（）效应。

A.月光

B.砂金

C.晕彩

D.星光

树枝状生长