单选题Closed plane figures like the square or the equilateral triangle can be grouped into a class ______ polygons.

单选题Researchers all over the world have been seeking for determining how early infancy conceptual thinking is possible. A. have been seeking about determining B. have been seeking to determine about C. have been seeking to determine D. have sought to determine

单选题{{U}}For{{/U}} all their protestations, they heeded the judge's ruling.

单选题The situation is bound to {{U}}deteriorate{{/U}}.

单选题At first the university refused to purchase the telescope, but this decision was ______ revised.

单选题Here is some advice on food shopping. The 61 family spends about one-sixth of its income 62 food. Because food is expensive, it is important to spend the money wisely when you shop. A careful shopper can prepare nourishing and delicious meals 63 . Here are some 64 to help you shop better. Buy only the food you need. There are several ways to 65 buying extra food. First, make a shopping list before you go to the store. Then, when you are at the store, 66 your list carefully. 67 , do not go shopping if you are hungry. When you are hungry, foods look very delicious and you want to buy more than you need. 68 , to shopping 69 if you can. If you shop with young children, they often ask you to buy them unnecessary food like candy. When you have a 70 , choose the 71 expensive brand of a product. There are three points to remember when you buy a can of tomatoes, for example. First, look at the advertisements in the newspaper to see if your supermarket is 72 a "special" on canned tomatoes. In 73 , when you are in the store, you should check the price 74 pound of tomatoes. Sometimes you save money if you buy the larger size can; sometimes, 75 , you do not. Third, remember that a grade A product or a more expensive product is not necessarily 76 healthful than a grade B or less expensive product. Grade A tomatoes may look better, but all canned tomatoes have the same nutrients. Shoppers seem to have special difficulties when they buy fresh fruits and vegetables. There are several things to consider when buying fresh foods. Because fresh foods 77 if they are not used, you have to buy the correct amount 78 the number of people you are serving. In addition, plan to use fresh foods that are in season because fresh foods are generally less expensive then. Lastly, choose fruits and vegetables that 79 a bright, fresh color. A good color is often a 80 that the food has a lot of vitamins.

单选题The experience of foreign countries is worth learning from and taking for reference. A. learning and reference. B. our learning and our reference C. our learning from and taking for reference D. our learning and make reference to

单选题By the time of 1969, there Uwere/U many space explorations.

单选题Yesterday the manager insisted that the contract______signed as soon as possible. A．had B．have C．have been D．be

单选题I have to say this, but this coat you've just bought is made of ______ fur; it's not real mink. A. coarse B. genuine C. slippery D. fake

单选题The promised wage increase is being held back while it is examined by the government to see if it is greater than the law allows.

单选题We were pleased to see that, besides our own villagers, the audience was made up of a fair number of people {{U}}out of around villages.{{/U}}

单选题Nineteenth-century scholars tried to trace the origins of modern languages to ancient Hebrew.

单选题{{B}}Passage Three{{/B}} Uffizi Tries to Outdo LouvreUffizi试图胜过卢浮宫 Italy is to try to turn the Uffizi gallery in Florence into Europe's premier art museum, with an ambitious 56m euro scheme to double its exhibition space. Giuliano Urbani, Italy's culture minister, said the enlarged gallery would surpass "even the Louvre". By the time work is completed, visitors to the extensively remodeled Uffizi will be able to see 800 new works, including many now confined to the gallery's storerooms for lack of space. The project—the outcome of nine months of intensive work by a team of architects, engineers and technicians—is a centrepiece of the cultural policy of Silvio Berlusconi's government. With refurbishment plans also afoot for the Accademia in Venice and the Brera in Milan, Italy is bent on securing its share of a market for cultural tourism that is threatened not just by the Louvre, but also by the " art triangle" of Madrid, which takes in the Prado, the Thyssen collection and the Reina Sofia museum of art. Schemes for the expansion of the Uffizi's exhibition space stretch back almost 60 years. The latest was mooted in the mid-1990s. But the one adopted by the present Italian government has reached a far more advanced stage than any of its forerunners. Roberto Cecchi, the government official in charge of the project, said yesterday that all that remained to do was to tender for contracts. The first changes will be seen as early as next week when a collection of pictures by Caravaggio and his school, including the artist's Bacchus, currently crammed into a tiny room on the second floor, is to be moved to more expansive premises on the first. Mr.Cecchi said the biggest problem faced by his team was "inserting a museum into a building that is itself a monument". The horseshoe-shaped Palazzo degli Uffizi, began in 1560, was designed by the artist and historian Giorgio Vasari. The latest plans are bound to stir controversy, involving as they do the creation of new stairwells and lifts in the heart of the building. There has already been an outcry over one proposed element, a seven-storey, canopy-like structure for a new exit by the Japanese architect Arata lsozaki. But Mr.Urbani said in Florence on Tuesday that part of the scheme was "subject to further evaluation". At the heart of the plan is the opening up of the first floor of the vast building, which for decades was occupied by the local branch of the national archives. This will allow visitors to follow a more extensive, and ordered, itinerary that would turn the Uffizi into what Antonio Paolucci, Tuscany's top art official, called "a textbook of art history". As at present, visitors will be channelled to the second floor, where they will be able to study early works by Cimabue and Giotto before moving on to admire the gallery's extraordinary collection of Renaissance masterpieces, including Botticelli's Primavera. But most of what was painted after 1500 is to be moved down a storey to new exhibition space, and on the ground floor there will be a more extensive collection than at present of modern art. The overall increase in exhibition space will be from 6,000sq metres to almost 13,000. Asked if the expansion might not increase the risk of inducing Stendhal's syndrome—the disorientation, noted by the French novelist, in those who encounter dozens of Italian Renaissance masterpieces—Mr. Cecchi replied fatalistically, "Yes. It'll double it".

单选题Amniocentesis can reveal whether a fetus is suffering from any of a variety of chromosomal defect.

单选题John is no match______his younger brother at table tennis.

单选题A pigment called melanin protects the ______ layers of skin from sun rays.

单选题The olfactory regions of the nose are yellow, richly moist, and ______.

单选题There has been enough playing around, so let"s get down to business .

单选题When I returned home from a long journey, I found my house______.