关于中期妊娠保健，下列说法正确的是（） A.系统产前检查，每两个月进行一次 B.从妊

Put 2 February in your diary! It is World Wetlands Day! It marks the date that the

Convention(公约) on Wetlands was signed(签署)in1971.This special day was first celebrated in 1997 and it is celebrated every year.

The celebration is a call for action. It is a way to show people how important and

useful the wetlands are for people. On World Wetlands Day, people around the world take

part in many wetlands activities. People take trips to the local wetlands. There are talks

about how important the wetlands are. People get together to clean up their local wetlands

Children draw pictures to advertise the day. People also compete(比赛)in boat races.

The World Wetlands Day is important! If there are no wetlands, there will be no water for anyone in the future. Wetlands help protect nature and resources(资源)like fresh water. Already,  more than 10000 million people in the world do not have fresh water.

Many people do not know how important the wetlands are. They can understand why an

elephant or a tiger is important because they are big, beautiful animals. It is much harder for

them to understand how important the animals in the wetlands are. These small animals,

such as frogs and snails, play a very important part in keeping the balance of nature.

All plants and animals are part of the food chain(链).If the small wetlands animals

die, some animals in the food chain will have nothing to eat. They will also die. People

need the wetlands to keep the balance of nature in the world. If we do not protect nature

today，it will be gone tomorrow.

小题1:What should you put in your diary?

A．Some frogs.

B．The date of World Wetlands Day.

C．1971

D．Any special day.小题2:Where do people celebrate World Wetlands Day?

A．All over the world.

B．In ships

C．At home.

D．In their own way.小题3:Which of the following sentences is NOT true?

A．People celebrate World Wetlands Day by taking part in competitions.

B．People celebrate World Wetlands Day by taking hips to local wetlands.

C．People celebrate World Wetlands Day by listening to talks about the wetlands.

D．People celebrate World Wetlands Day by talking about the weather.小题4:Why are small animals important?

A．They are part of the balance of nature and the food chain.

B．They are beautiful.

C．Bigger animals are eaten by them

D．Without them, there may be no water.小题5:Which of the following might be the best title of the article?

A．Wetlands Are Important

B．Small Animals Are Also Important

C．World Wetlands Day

D．Food Chain

阅读材料，回答问题。（13分）

材料一：行省是元代开始设置的一级行政区划。它的确立是我国行政制度的一次重大改革……元朝的行省实际上是封建中央集权分寄于地方，故行省，官员的权力相当大。它负责处理境内政治、军事、经济等各类事务。此外行省还有一个重要职能是聚集境内财富，以供中央需要。行省的治所往往就是完成这种职能的“中转站”。

——《中学历史教学史料汇编》

材料二：第四条——各州对他州的法令、官方文件和诉讼应有充分的信任和尊重；对他州的公民不得歧视，各州的公民享有平等的特权和豁免权；各州相互有义务引渡逃犯。

第六条——本宪法和根据本宪法所制定的合众国法律，以及根据合众国的权力已缔结或将缔结的一切条约，皆为全国的最高法律；每个州的法官均应受其约束，即使州的宪法和法律的任何条款与之相抵触。

第十条修正案——宪法未授予合众国、也未禁止各州行使的权力，得由各州或由人民保留。                                           ——以上材料均摘自《美国宪法》

（1）根据材料一归纳行省的主要职能并结合所学知识指出元朝设置行省的积极影响。（6分）

（2）根据材料二概括说明美国中央政府与地方政府之间的关系。(3分)

（3）综合上述材料分析以上两项制度的共性，对此你有何认识?(4分)

美国对于利益冲突的规范大体上分几个层次（）

A.研究机构

B.各州

C.各学校

D.联邦

关于生态系统能量流动的叙述，不正确的是（）

A.能量是单向流动的

B.能量的源头是阳光

C.能量是循环流动的

D.能量流动是逐级递减的