在其他条件相同情况下，用酸液再生（）强酸阳离子交换树脂，再生效率最高。A.铁型 B.

在声场内的一定点位上，将某一段时间内连续暴露的不同A声级变化，用能量平均的方法以A声级表示该段时间内的噪声大小，这个声级称为( )。

A．倍频带声压级

B．昼夜等效声级

C．A声功率级

D．等效连续A声级

Two Christmas traditions have come under attack in recent years from environmentalists: Christmas cards and Christmas trees.

Paper cards are seen as wasteful and, for some people, going card-free is another way of going green. They also argue that in a world of e-mail, Skype, Facebook and Twitter, people are in touch all the time anyway; they no longer need the yearly card that connects them with long lost friends. If you want to send Christmas greetings, there are free e-cards, which get the job done with no postage or wasted paper.

However, especially for people who didn’t grow up with e-mail, there is something missing from a Christmas e-mail. The first Christmas cards appeared in London in 1843 and were designed by the same man who had introduced the world’s first postage stamp three years earlier. His name was Sir Henry Cole.

They rose in popularity throughout the 20th century. Many people sent cards that were sold for charity. The most famous of these are the ones sold for UNICEF. In the UK this year, in the three weeks before Christmas, the post office expects to handle 100 million cards every day. Environmental awareness also means that nowadays many people recycle their cards; this helps raise money to plant more trees, as well as recreating more paper.

When we think of trees at Christmas, there is one that immediately springs(跃入)mind---the evergreen tree that people decorate with ornaments and place their presents under. The custom dates back almost a thousand years to Germany. Nowadays 33 to 36 million Christmas trees are produced in America and 50 to 60 million in Europe each year. Some trees are sold live with roots and soil so people can plant them later and reuse them next year.

Some people prefer artificial trees as they are reusable and much cheaper than their natural alternative. However, environmentalists point out that they are made from petroleum (石油) products and so have many pollution issues.

小题1:What is the main idea of the article?

A．To introduce the history of two typical Christmas traditions.

B．To explain the debate about some Christmas traditions.

C．To analyze how two Christmas traditions grew in popularity.

D．To point out the problems caused by celebrating Christmas.小题2:What does the underlined word “They” in the fourth paragraph probably mean?

A．Many people

B．Christmas e-mails

C．Postage stamps

D．Christmas cards小题3:Some people suggest getting rid of paper cards because     .

a. they cannot be recycled         b. they are not environmentally friendly

c. they are mostly sold for charity  d. the e-cards have many advantages over them

e. they are not as necessary as they used to be for people

A．a, b, d

B．a, c, d

C．b, d, e

D．b, c, e小题4:What can we conclude from the article?

A．The first Christmas cards were designed earlier than the world’s first stamps.

B．This year has seen a dramatic drop in Christmas card sales.

C．Environmentalists advise people to buy cards that are sold for charity.

D．Growing environmental awareness is encouraging people to recycle their cards.小题5:Which of the following statements in TRUE according to the article?

A．There is always a wider Christmas tree market in America than in Europe.

B．The custom of decorating Christmas trees first appeared in Britain.

C．Some people prefer to buy live trees that can be reused next year.

D．Artificial trees are better than natural ones in all aspects.

试述多发伤的临床特点。

建设工程总承包商将部分项目分包给专业企业时，分包合同与总承包合同的约定应当一致。（ ）

读图回答问题（8分，每个空格1分）

（1）表示南亚雨季的是_____图，表示凉季的是____图。

（2）甲图表示的是______季风，乙图表示的是______季风，给南亚带来大量降水形成雨季的是______季风。

（3）在图甲和图乙两种季风的影响下，南亚大部分地区属于___________气候，这种气候在南亚最显著的特征是_____________________，年降水量并不稳定，容易发生________灾害，给农业生产造成不同程度的影响。