我国正在大力推广使用节水便器，国家标准规定的节水便器要求每次冲洗的用水量为不大于（）

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      Why play games? Because they are fun, and a lot more besides.Following the rules...planning your

next move...acting as a team member...these are all"game"ideas that you will come across throughout

your life.

     Think about some of the games you played as a young child, such as ropejumping and hideandseek.

Such games are entertaining and fun.But perhaps more importantly, they_translate_life_into_ exciting_

dramas that teach children some of the basic rules they will be expected to follow the rest of their lives,

such as taking turns and cooperating (合作).

      Many children's games have a practical side.Children around the world play games that prepare them

for work they will do as grownups.For instance,some Saudi Arabian children play a game called bones,

which sharpens the handeye coordination(协调) needed in hunting.

     Many sports encourage national or local pride.The most famous games of all, the Olympic Games,

bring athletes from around the world together to take part in friendly competition.People who watch the

event wave flags,knowing that a gold medal is a win for an entire country, not just the athlete who earned

it.For countries experiencing natural disasters or war,an Olympic win can mean so much.

     Sports are also an event that unites people.Soccer is the most popular sport in the world.People on

all continents play it-some for fun and some for a living.Nicolette Iribarne, a Californian soccer player,has

discovered a way to spread hope through soccer.He created a foundation to provide poor children with

not only soccer balls but also a promising future.

      Next time you play your favorite game or sport, think about why you enjoy it, what skills are needed,

and whether these skills will help you in other aspects of your life.

1. Through playing hideandseek, children are expected to learn to________.

A. be a team leader

B. obey the basic rules

C. act as a grownup

D. predict possible danger

2. The underlined part in Paragraph 2 most probably means that games can________.

A. describe life in an exciting way

B. turn reallife experiences into a play

C. make learning life skills more interesting

D. change people's views of sporting events

3. According to the passage, why is winning Olympic medals so encouraging?

A. It inspires people's deep love for the country.

B. It proves the exceptional skills of the winners.

C. It helps the country out of natural disasters.

D. It earns the winners fame and fortune.

4. Iribarne's goal of forming the foundation is to________.

A. bring fun to poor kids

B. provide soccer balls for children

C. give poor kids a chance for a better life

D. appeal to soccer players to help poor kids

形成酸雨的根本原因是（　　）

A．臭氧层的破坏

B．噪声污染

C．化肥、农药的大量使用

D．工厂大量使用煤、石油作为能源

水泥路面磨光时，宜采用（）的方法来恢复抗滑能力

石油现货价格为35美元/桶，无风险利率为6%，按连续复利，原油贮藏成本为5%，持有原油库存便利收益为4%，那么1年期原油期货合约的价格为______。

A．34.59元
B．37.54元
C．39.42元
D．42.00元

超过鱼对糖的利用能力限度，多余部分则合成脂肪，长期摄入过多的（），会导致脂肪肝，使肝功能减弱，解毒力下降，鱼体呈肥胖型。

A.蛋白质

B.无机盐

C.糖

D.维生素