某出版社拟出版一本书，经测算固定成本为20000元，单位售价为12元，单位变动成本为

Nobody but Tom and Lucy ______ the fact.
A. knowsB. know C. is known

2010年冬，欧洲多个国家接连遭遇强降雪和低温天气，有些地区最低温度甚至打破10年以来的最低纪录。波兰科学家指出，之所以出现这种极端天气形态，是因为在“拉尼娜”现象的影响下，墨西哥湾暖流活动速度减缓所致。这股洋流是维持地球气候平衡的重要因素之一，一旦墨西哥湾暖流完全停止活动，欧洲将进入新的冰河世纪。读图，回答1~3题。

1、下列有关墨西哥湾暖流的说法，错误的是 [ ]

A、北大西洋暖流强度与墨西哥湾暖流密切相关

B、墨西哥湾暖流促进了纽芬兰渔场的形成

C、墨西哥湾暖流与拉布拉多寒流相遇往往形成茫茫海雾

D、墨西哥湾暖流的形成主要是受中纬西风的影响

2、图中界线可能是1月0℃等温线的是 [ ]

A、甲

B、乙

C、丙

D、丁

3、受墨西哥湾暖流活动速度减缓的影响，1月0℃等温线将会发生的变化可能为 [ ]

A、整体向西南方向移动

B、整体向东北方向移动

C、整体向东南方向移动

D、整体向西北方向移动

阅读理解。

      Why play games? Because they are fun, and a 1ot 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 off the games you played as a young child, such as rope-jumping and hide-and-seek.

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 grown-ups. For instance, some Saudi Arabian children play a game called bones, which

sharpens the hand-eye 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 hide-and-seek, children are expected to learn to _____. [ ]

A. be a team leader

B. obey the basic rules

C. act as a grown-up

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 real-life 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

5. What can be inferred from the passage? [ ]

A. Games benefit people all their lives.

B. Sports can get all athletes together.

C. People are advised to play games for  fun.

D. Sports increase a country's competitiveness.

晨僵可以见于下列哪一种疾病（）。

A.系统性红斑狼疮

B.风湿性多肌痛

C.骨性关节炎

D.类风湿关节炎

E.以上疾病均可出现

下列的工具是组装电脑必备的工具（）

A、一字螺丝刀

B、十字螺丝刀

C、尖嘴钳

D、镊子