右下图表示某生态系统中4种成分之间的关系。以下相关叙述中，正确的是（） A．4可以表

Reading comprehension.

     According to legend, the Bridge of Sighs in Venice, Italy, which connects the Palazzo Ducale to an

ancient prison, got its name because the walk across it gave prisoners on their way to jail a final chance

to appreciate the beauty of the city.

     The view from the bridge today, however, is more likely to be of a giant billboard selling Bulgari or

Coca-cola. Beyond the billboards, monuments are being restored. The money comes from advertising

profits.

     But when the Coke billboards went up this summer on buildings near the Piazza San Marco, which is

at the historic heart of Venice, there was a public debate.

     "We can't commercialize everything," said Alessandra Mottola Molfino, a Venetian. "The lesson that

goes out is that a price is for everything."

     "We couldn't stay quiet," said Maria Camilla Bianchini d'Alberigo, president of a heritage protection

association. "Too much is too much."

     There needed to be rules, she added, rules that prevent the advertising billboards clashing (冲突) with

the monuments of the city.

     City of officials, however, argue that without these ads, the city could not afford to maintain its heritage.

Many have been damaged by centuries of wear and are even a threat to public safety.

     "I can't turn down the image of bottle when there are pieces of the Palazzo Ducale falling to the ground,"

said Renata Codello, a Culture Ministry official.

     The Culture Minister has a budget of about $ 47 million (315 million yuan) for restoration of monuments,

but Italy has a rich architectural heritage, and funds are always tight．Of that amount, $ 1.8 million was given

to the entire Vector region, which includes Venice. 

     Two years ago, the city signed an agreement with the Dotter Group, a company responsible for the

restoration of the Bridge of Sighs and the Palazzo Ducale．It allows it to sell ad space. 

     But there is a condition in the agreement: The ads should not offend public taste.

     In August, Venice banned US actress Julianne Moore's Bulgrari ad from a billboard in the Piazza San

Marco.

     The photo shows a naked Moore covered with lion cubs, handbags and jewelry, Mayor Giorgio Orsoni

called the image too racy (猥亵) and unsuitable for the Piazza San Marco. 

     "I take account of the fact that Venice is part of the real world…but we cannot accept these Hollywood-

style images. There arc intelligent sponsors, and we need to come up with advertising that suits Venice, not

Times Square," he said in a speech.  

1. The article is mainly about _____ in Venice. [ ]

A. restoration of cultural heritage

B. widespread commercialization

C. the conflict between ads and cultural heritage

D. the difficulty of restoring monuments

2. In the first paragraph, the beautiful view from the Bridge of Sighs is mentioned to _____. [ ]

A. introduce other monuments of the ancient city

B. show how much many ancient structures need restoring

C. indicate that the view is blocked by huge ads

D. create interest in the famous city

3. From the article we can conclude that Rcnata Codello _____ the advertising.[ ]

A. is in favor of

B. is worried about

C. objects to

D. doesn't mind

4. Why do many Venetians complain about the ads? [ ]

A. They are intolerant of commercialization.

B. They feel the ads are damaging the city.

C. The ads are usually racy and in an American style.

D. The ads don't present a traditional view of Venice.

5. It can be inferred from the passage that _____.[ ]

A. Hollywood stars' ads cannot go up in Venice

B. the mayor of Venice is expecting new advertising

C. the Dotter Group may stop its restoration work for lack of funds

D. people can buy Bulgaria or Coca-cola on the Bridge of Sighs

烧结矿鼓前一次振动筛的筛孔为（）mm、（）mm。

反映肾小球滤过功能最可靠的指标是

A．血尿素氮

B．内生肌酐清除率

C．血肌酐

D．血尿酸

E．尿肌酐

古希腊百科全书式的哲学家( )，首次提出了“教育遵循自然”的观点，他倡导的和谐教育成为后来全面发展教育的思想渊源。

A．柏拉图
B．苏格拉底
C．亚里士多德
D．昆体良

悬索桥两桥塔间距离3km，垂跨比为1/12，吊杆最短处长5m，则桥塔至少应高出桥面( )m。

A．250

B．255

C．260

D．280