潜水员在水深为h的地方，发现（ ） A．头顶上有一圆形亮斑，如果水对空气的临界角

因严重违反《传染病防治法》及有关法律规定，按照《刑法》规定，下列哪种违法犯罪行为可被判处3年以下有期徒刑或拘役，并处或单处罚金（）

A.引起甲类传染病传播或有传播危险的

B.引起乙类传染病传播或有传播危险的

C.从事传染病防治工作的人员严重不负责任，导致传染病传播流行的

D.违反国境卫生检疫规定，引起检疫传染病传播或有传播严重危险的

E.从事实验、保藏传染病菌种、毒种的人员违反国家规定，造成传染病菌种、毒种扩散，后果严重的

某铜矿2002年11月开采铜矿石50000吨，全部对外销售。该铜矿属于三等矿，单位税额为每吨1.4元，则其本月应纳的资源税为（）。

A．2.8万元

B．4.2万元

C．4.9万元

D．7万元

Puerto Rico may be part of the USA but its music and dance is a mixture of both Spanish and African rhythms. The country, as a result, is a mixture of very new and very old. It exhibits the open American way of yet retains the more formal Spanish influences. This is reflected in the architecture, not just the contrast between the colonial and the modern in urban areas but also in the countryside, where older buildings sit side by side with concrete schools and buildings.

However, if you do not wander beyond the tourist areas on the coast, you will not experience the real Puerto Rico. Old volcanic mountains, long inactive, occupy a large part of the interior（内陆）, with the highest peak, Cerro de Punta, at 1,338m in the Cordillera Central. North of the Cordillera is the karst （岩溶）country where the limestone（石灰石）has been acted upon by water to produce a series of small steep hills and deep holes. The mountains are surrounded by a coastal plain with the Atlantic shore beaches cooled all the year round by trade winds.

The population is 3.8 million, of which about 1.5 million live in San Juan, although about another two million Puerto Ricans live in the USA Average life expectancy is 73.8 years and GDP per capita is US $12,212, the highest in Latin America, although not up to the level of mainland USA. Most Puerto Ricans do not speak English and less than 30% speak it fluently. Second generation Puerto Ricans who were born in New York but who have returned to the island, are called Nuyoricans. The people are very friendly and hospitable but there is crime, liked to drugs and unemployment.

小题1:What are the disadvantages of Puerto Rico?

A．Too many Puerto Ricans live in the USA

B．Few people in Puerto Rico can speak English

C．Puerto Rico’s GDP is lower than that of the USA

D．Social problem connected with drugs and lack of jobs.小题2:We can learn from the passage that Puerto Rico _________.

A．is a state of the United States

B．used to be ruled by Spain

C．is an agricultural country

D．is gently affected by Africa小题3:Nuyorican is a person who _______.

A．has been living in New York

B．is living in New York

C．was born in New York but has returned to Puerto Rico

D．has got the citizenship of America小题4:What does the underlined word “retains” mean?

A．loses

B．keeps

C．enjoys

D．returns

两台泵串联工作时，要求两台泵的（）相同。

A.扬程

B.流量

C.功率

D.效率

B分段盐析