国家统计局公布的数据显示，2010年我国全年实际使用外商直接投资金额1 057亿美元，比上年增长17.4%；非金融类对外直接投资额590亿美元，比上年增长36.3%；全年对外承包工程业务完成营业额922亿美元，比上年增长18.7%。这表明(　　)
①我国坚持“引进来”和“走出去”相结合的战略，对外开放的水平不断提高　
②我国不断创新利用外资方式，利用外资的结构得到优化　
③我国与世界各国的经济联系日益增强　
④我国积极参与区域经济交流与合作，充分利用国际、国内两个市场发展经济

比较阅读

甲 天时不如地利，地利不如人和。三里之城，七里之郭，环而攻之而不胜;夫环而攻之，必有得天时者矣，然而不胜者，是天时不如地利也。城非不高也，池非不深也，兵革非不尖利也，米粟非不多也，委而去之，是地利不如人和也。故曰，域民不以封疆之界，固国不以山溪之险，威天下不以兵革之利。得道者多助，失道者寡助;寡助之至，亲戚畔之;多助之至，天下顺之。以天下之所顺，攻亲戚之所畔，故君子有不战，战必胜矣。

　  乙 子贡问政。子曰:“足食,足兵,民信之矣。”子贡曰:“必不得已而去,于斯三者何先?”曰:“去兵。”子贡曰:“必不得已而去,于斯二者何先?”曰:“去食。自古皆有死,民无信不立”。

　　(选自《论语》)

已知 ， ，求 的值．

如图所示，位于水平桌面的的物块P由跨过定滑轮的轻绳与物块Q相连，从滑轮到物块P和到物块Q的两段绳都是水平的。已知物块Q与物块P之间以及物块P与桌面之间的动摩擦因数都是μ，两物块的质量都是m，滑轮的质量、滑轮轴上的摩擦都不计，若用一水平向右的力F拉物块P使它做匀速运动，则F的大小为

根据短文内容和首字母提示补全单词，使短文完整、正确。

       People live in different kinds of houses in the world. Usually, each house has i____ own living rooms, bedrooms, kitchen and b____. Different houses have different n____. What are they? Now, let’s take a look.

       A flat is usually in a building. There are usually many f____ living in the same flat building. People in a flat building s____ the same stairs（楼梯） and lift to go up and down.

       A townhouse has two floors. In a townhouse, the kitchen, the living room and dining room are usually on the ground floor, and the bedrooms are usually on the f ____  floor.

       A farmhouse is a house on a farm. There are many farmers living there. There is a large yard （院子） in f____ of it. There are also some “houses” for cows and hens near the farmhouse. The field is not f____ from the farmhouse, so farmers always go to the field on f____.

       A dormitory is a large bedroom in a s____, and every 4—8 students share one dormitory. They share the same bathroom, but each student has his or her own bed. Students can learn how to get along well（相处）with each other in a dormitory.