( )，又称政治风险保险，是承保被保险人因投资引进国政治局势动荡或政府法令变动所引

Most people in Britain live in small family groups. More than a quarter of houses in Britain have only got one person in them. Some of these are old people but some are people of twenty to thir­ty who choose to live alone. 35% of houses have two people in them, and another 17% have three people. 15% have four people in them, and the other homes have five or more.

The families in Britain are small. It is unusual for parents to have more than two children. When children are about eighteen or nineteen, they leave their parents’ home, and they often go to a different city. Sometimes they only visit their parents two or three times a year.

小题1:  How many houses in Britain have 3 people living in them?

A．8% of houses.

B． 15% of houses.

C．17% of houses.

D．35% of houses.小题2:   At what age do children in Britain usually leave their parents’ home?

A． About 18 or 19.

B． About 20 or 21.

C． About 25 or 26.

D． About 30 or 31.小题3:   What do you think the passage is?

A． An instruction.

B． A report.

C． A play.

D． A joke.小题4:   What does the passage mainly tell us?

A． Young people in Britain.

B． Old people in Britain.

C． Families in Britain.

D． The population in Britain.小题5:   According to the passage, which of the diagrams is right?

选出下列各组中书写完全正确的一项[ ]

A．莫名　谈笑风声　巧妙绝伦　永往直前

B．狼籍　峰拥而至　不屑置辩　微不足道

C．殉职　寻人启事　漫不经心　不言而喻

D．装订　戒骄戒燥　无精打采　格物致知

（6分）下图是某些常见物质之间转化关系，已知D为地壳中含量最多的金属元素的单质，B为氧化物，C是一种稀酸，其浓溶液用水稀释时会放出大量的热，E为蓝色溶液，A、F均为单质。试回答下列问题（框图中的反应条件和有些生成物已略去）：

（1）请写出下列物质的化学式：A．     ，B．     ；

（2）上述反应中，属于置换反应的有     个，请写出其中任意一个置换反应的化学方程 式：            ；

（3）请写出F在生产生活中的任意一种用途       。

关井程序中，如未安装司钻控制台，由（）通过远程控制台关防喷器。

A、司钻

B、副司钻

C、井架工

D、场地工

中国最早的灌溉工程，首推黄河流域（）的（在今陕西省咸阳西南），《诗经》中有“滮池北流，浸彼稻田”的记载。

A.都江堰

B.滇池

C.滮池

D.郑国渠