古代警察行使职权，在法律上是极不严格的，神权、皇帝或长官的意志起决定作用。( )

We're _____ at the _____ news that Saddam was sentenced to death. [ ]

A. amazing; amazed

B. amaze; amazing

C. amazed; amazing

D. amazed; amazed

地面、墙壁、家具消毒可用下列哪些溶液擦拭（）。

A.1%～3%含氯石灰溶液

B.0.2～0.5%过氧乙酸溶液

C.1000mg/L～2000mg/L含氯消毒剂

D.0.2%氯己定溶液

E.0.5%氯胺T溶液

阅读理解。

     When Christopher Columbus landed on the then unnamed Costa Rica in 1502, he saw many

Indians wearing gold earrings. So he thought the land must be rich in gold. He named the place

Costa Rica, which means "rich coast" in Spanish.

     Though little gold was found, Costa Rica today is indeed rich with coffee and bananas. Coffee

is the most important product in Costa Rica and most of it is exported (出口) to other countries

like America and West Germany. Bananas are the country's second most important export.

Costa Ricans also grow many other crops such as fruits, corn and beans for their own use. Costa

Ricans love colors and their houses are painted in bright colors.

     Education is very important to the Costa Ricans. Almost every village has a school and education

is a must for children between seven and fourteen years of age. Boys and girls go to separate

(单独的) schools. Classes begin in March and end in November. The other three months of the

year are harvest time and the children have to help their parents to pick coffee beans.

1. What's the main idea of the first paragraph?

A. How Columbus found Costa Rica.  

B. How Costa Rica got its name.

C. What the Costa Ricans wore.    

D. What language the Costa Ricans spoke.

2. The Costa Ricans may NOT paint their houses ______.

A. pink and red    

B. grey and black

C. blue and green      

D. yellow and orange

3. In Costa Rica, boys and girls between seven and fourteen ______.

A. must go to school              

B. study in the same school

C. do not have to go to school at all    

D. can choose to stop schooling at any time

4. This passage is mainly about ______.

A. Christopher Columbus        

B. Costa Rica  

C. some products from Costa Rica  

D. the education of Costa Rica

某位同学想研究中国现代经济史，看到附图，这是我国某一历史时期的经济结构示意图，他看到的这个图，最有可能属于

A．1978年后社会主义建设新时期

B．1956—1966年全面建设社会主义时期

C．1966—1976年 * * 时期

D．1953—1956年过渡时期

在买卖双方进行电子交易过程中扮演确认双方身份角色的是（）

A、认证中心

B、网络交易中心

C、网上银行

D、国家工商行政机关