在关系模型中，把数据看成是二维表，每一个二维表称为一个 【3】 。

少尿是指24小时尿量小于（）

A.100ml

B.200ml

C.400ml

D.50ml

E.250ml

下列哪一项能反映小叶性肺炎的本质（）。

A.支气管及肺泡的化脓性炎症

B.支气管及肺泡的纤维素性炎症

C.支气管及肺泡的卡他性炎症

D.支气管及肺泡的出血性炎症

E.支气管及肺泡结构的破坏

社会历史批评最主要关注的是文学文本的（）层面。

A.形象—情感层面

B.抽象—理性层面

C.语词—字义层面

D.艺术—技术层面

The Southdale shopping centre in Minnesota has an atrium, a food court, fountains and acres of parking. Its shops include a Dairy Queen, a Victoria’s Secret and a purveyor of comic T-shirts. It may not seem like a landmark, as important to architectural history as the Louvre or New York’s Woolworth Building. But it is. "oh, my god!" chimes a group of teenage girls, on learning that they are standing in the world’s first true shopping mall. "That is the coolest thing anybody has said to us all day. "

In the past half century Southdale and its many imitators have transformed shopping habits, urban economies and teenage speech. America now has some 1,100 enclosed shopping malls, according to the International Council of Shopping Centres. Clones have appeared from Chennai to Martinique. Yet the mall’s story is far from triumphal. Invented by a European socialist who hated cars and came to deride his own creation, it has a murky future. While malls continue to multiply outside America, they are gradually dying in the country that pioneered them.

Southdale’s creator arrived in America as a refugee from Nazi-occupied Vienna. Victor Gruen was a Jewish bohemian who began to design shops for fellow immigrants in New York after failing in cabaret theatre. His work was admired partly for its uncluttered, modernist look, which seemed revolutionary in 1930s America. But Gruen’s secret was the way he used arcades and eye-level display cases to lure customers into stores almost against their will. As a critic complained, his shops were like mousetraps. A few years later the same would be said of his shopping malls.

By the 1940s department stores were already moving to the suburbs. Some had begun to build adjacent strips of shops, which they filled with boutiques in an attempt to re-create urban shopping districts. In 1947 a shopping centre opened in Los Angeles featuring two department stores, a cluster of small shops and a large car park. It was, in effect, an outdoor shopping mall. Fine for balmy southern California, perhaps, but not for Minnesota’s harsh climate. Commissioned to build a shopping centre at Southdale in 1956, Gruen threw a roof over the structure and installed an air-conditioning system to keep the temperature at 75°F (24℃)—which a contemporary press release called "Eternal Spring". The mall was born.

Gruen got an extraordinary number of things right first time. He built a sloping road around the perimeter of the mall, so that half of the shoppers entered on the ground floor and half on the first floor-something that became a standard feature of malls. Southdale’s balconies were low, so that shoppers could see the shops on the floor above or below them. The car park had animal signs to help shoppers remember the way back to their vehicles. It was as though Orville and Wilbur Wright had not just discovered powered flight but had built a plane with tray tables and a duty-free service.

Which of the following is not the extraordinary thing Gruen got for the first time（）

A. Sloping road around the perimeter of the mall

B. Free shipping services

C.Low balconies of the shops

D. Animal signs in car park

Dear Guests,
We would like to reduce the impacts this event has on the environment to a minimum (最小值), therefore we would like to encourage you to take part in our "Eco-Stay" program during your stay in this hotel.
To save water and reduce water pollution, we do not change the towels every day.
To reduce wastes of resource and energy, such single-use items as toothbrush, comb (梳子) and razor (剃须刀) will not be provided at the time of your check-in.
To reduce the impacts that waste has on the environment, we would like to encourage you to take part in our waste sorting and recycling program. Please place paper, glass and metal in the plastic bag in each room. The materials in the bag will be collected after the meeting, and be delivered to a waste collection station in the city where they will be further sorted and delivered to recycling facilities.
Eco-stay Guidance
The guidance intends to reduce the impacts on (46) .
The hotel will not change the towels every day in order to (47) .
(48) will not be provided in order to reduce wastes of resource and energy.
The purpose of the waste(49)program is to reduce the impact of the waste.
The materials will be delivered to a (50) .