【正文】 fashioned advice that it’s best to sleep on a problem．They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day．The lead researcher Bob Stickgold at Harvard Medical School said，“Sleep helps us draw rules from our experiences．It’s like knowing the difference between dogs and cats even if it’s hard to explain．”The US research team studied how well students remembered connections between words and symbols，reports New Scientist．They pared how the students performed if they had had a sleep between seeing the words and having the test，and if they had not slept．They found that people were better able to remember lists of related words after a night’s sleep than after the same time spent awake during the day．They also found it easier to remember themes that the words had in mon．But they forgot around one in four more themes if they had been awake．Prof．John Groeger，University of Surrey’s Sleep Research Centre，said，“People have been trying for years to find out what the purpose of sleep is，as we know that only certain parts of it have a restorative value．”“We form and store huge numbers of experiences in the head every day，and sleep seems to be the way the brain deals with them all．”1．The phrase “to sleep on a problem” in Paragraph 1 most likely means “________”．A．to pay full attention to a problem B．to wait until the next day for a decisionC．to sleep to forget a problem D．to have difficulty in sleeping2．In the study by the US research team，students were asked to________．A．put together words of similar meaningsB．remember words and their meaningsC．show their knowledge of wordsD．make up lists of related words3．Which of the following may be easier to remember？A．Themes learned right before the test．B．Rules from personal experiences．C．Words learned before a good sleep．D．Ideas stored together in the brain．4．What may be the importance of the research？A．It shows that sleep may help us manage information．B．It helps find out the mon themes of words．C．It tells us that more sleep can improve health．D．It proves the value of old173。s and her death，she produced some 2，000 pictures：detailed and lively portrayals of the country life she had known for so long，with a wonderful sense of color and form．I think really hard till I think of something really pretty，and then I paint it she said．1．According to the passage，Grandma Moses began to paint because she wanted to________．A．make herself beautiful B．keep activeC．earn more money D．bee famous2．Grandma Moses spent most of her life________．A．nursing B．painting C．embroidering D．farming3．The underlined word “portrayals ”means________．A．descriptions B．expressions C．explanations D．impressions4．From Grandma Moses39。s ideas were proved to be correct．A scientist uses many tools for measurements．Then the measurements are used to make mathematical calculations that may test his investigations．1．What makes a scientist according to the passage？A．The tools he uses． B．His ways of learning．C．The way he uses his tools． D．The various tools he uses．2．“…knowing how to investigate，how to discover information，is important to everyone．”The writer says this to show_______．A．the importance of informationB．the difference between scientists and ordinary peopleC．the importance of thinkingD．the difference between carpenters and ordinary people3．A sound scientific theory should be one that_______．A．works under one set of conditions at one time and also works under the same conditions at other timesB．leaves no room for improvementC．doesn39。s knowledge must be exact．There39。s leading upanding economies，namely Brazil，Russia，India，China and South Africa．The BRICS aims to achieve peace，security，development and cooperation．It also seeks to contribute to the development of humanity and build a more stable and fairer world．The industry leaders from the business munities of the five countries agreed that the BRICS countries will actively support industrialization on the African continent in order to contribute significantly to its development and to expand trade links between Africa and BRICS．The global economic situation，though improving，continues to remain uncertain with the Eurocrisis a major concern．The task ahead is to build on these developments and BRICS countries remain mitted to the cause of promoting sustainable growth．Greater economic cooperation among BRICS countries can be significantly important，which will prove beneficial for global economic growth．According to Dr．Rob Davies，South African Minister of Trade and Industry，the African continent is recognized as the second fastest growing continent after Asia．There are four drivers of the economic growth in African continent．These are the boom in mineral products in the African continent，the development of the service industries，the benefit of not having the financial crisis，and infrastructure(基礎(chǔ)設(shè)施）development．Davies also adds that other BRICS countries have advantage of large populations providing big home markets for their products．The South African population is small pared to other BRICS countries，but if you add up numbers on continent then you have a critical mass that can support the new industrial wave in Africa：That is why the South African needs to create large trading blocks across large parts of African continent．1．“BRICS” refers to______．A． the most active economy group in today’s worldB． the most powerful economies in western worldC． leading countries with fast development of humanityD． the most stable and secure countries in the world2．From the text we know that industrialization in Africa will______．A．give financial supports to all African countriesB create trade opportunities for both Africa and BRICS C make significant development in the powerful groupsD．expand sustainable economic cooperation