全国硕士研究生入学考试英语冲刺试题(doc15)-考试学习(编辑修改稿)

全国硕士研究生入学考试英语冲刺试题(doc15)-考试学习(编辑修改稿)内容摘要：

此资料来自企业 ［ D］ The mining of gold can be traced back to the feudal age. 28. The author suggests that ［Ａ］ the . is the largest producer of gold in the world. ［ B］ ancient peoples collected gold in considerable amounts. ［ C］ gold was first mined in the . in the mid 1700s. ［ D］ governments keep the production of gold under control. 29. To develop his ideas, the author uses ［Ａ］ arguments and proofs. ［ B］ personal opinions. ［ C］ convincing examples. ［ D］ factual descriptions. 30. It can be inferred from the text that ［Ａ］ gold supplies are judged to be shrinking gradually. ［ B］ dentistry is demanding much more gold now than ever before. ［ C］ the yield of gold has been increasing since mid 1950s. ［ D］ gold has been highly valued as a strategic material. Text 3 Maybe it s a sign of a mature mind when some of life’s bigger questions— about love,faith,ambition— suddenly seem more manageable than smaller ones,such as:Why did I just open the refrigerator?Where on earth did I put my keys?Where did I write down that phone number? Our capacity for storing and recalling information does not stream down like sand through an hourglass,as neurologists once the contrary,new research suggests that,when stimulated in the right way,brains of almost any age can give birth to cells and fe fresh pathways to file away new emerging picture has not only encouraged those who treat and care for the 5% of older adults who have 此资料来自企业 dementia（痴呆症） such as Alzheimer’s disease,but also generated a wave of optimism among those studying memory changes in the other 95%,as well as an increasing public fascination with “memory enhancement” dietary supplements,books and brain improving techniques. The slight failures of memory that many of us attribute to a failing brain are often due to something entirely different:anxiety,sleep problems,depression,even heart biological nuts and bolts of learning and memory in fact change little over time in healthy people,researcher say.“There’s very little cell loss,and structurally all the machinery is there,even very late in life,”said a neuroscientist Greg s the cells speed and ability to send and receive signals that diminish gradually,which is what makes the mind go blank when trying to recall familiar words and names. For more than a decade,researchers have known that people who have active,intellectually challenging lives are less likely to develop dementia than those who do of this difference is attributable to intelligence,some doctors believe:The more you start with,the longer it takes to lose new evidence suggests that the act of using your brain is in itself protective,no matter who you are. All of the activities,such as reading newspapers,watching TV,playing games,etc.,can improve people s scores on standard tests measuring recall of numbers and names,experts also acknowledge,however,that there is a big difference between playing chess with a friend and doing a mental exercise,such as memorizing is an anic part of a person s life,the other a purely intellectual exercise,done in first is fun。 the second,often,is a tiring task. 31. According to the text,adult persons usually ［ A］ stress the settlement of bigger problems. ［ B］ focus their attention on great issues. ［ C］ overlook the remembrance of trivial things. ［ D］ suffer memory decline related to age. 32. According to new research,it s distinct that ［ A］ our brain cells can be producible. 此资料来自企业 ［ B］ our memory may be renewable. ［ C］ most mental illnesses are curable. ［ D］ brain mending methods are available. 33. The phrase “nuts and bolts” in most probably means ［ A］ basic structures. ［ B］ plex tasks. ［ C］ practical aspects. ［ D］ working parts. 34. As asserted by researchers,our inability to memorize words or names mainly ［ A］ results from the declining efficiency of brain cells. ［ B］ results in the brain s liability to radical interference. ［ C］ consists of different mental disorders. ［ D］ consists in various emotional problems. 35. Experts suggest that the best way to avoid memory failures is ［ A］ to take more dietary supplements. ［ B］ to keep mental function alive. ［ C］ to find an intellectual occupation. ［ D］ to do more intellectual exercises. Text 4 Nonindigenous (nonnative) species of plants and animals arrive by way of two general types of pathways. First, species having origins outside the United States may enter the country and bee established either as freeliving populations or under human cultivation— for example, in agriculture, horticulture, aquaculture, or as pets. Some cultivated species 此资料来自企业 subsequently escape or are released and also bee established as freeliving populations. Second, species of either . or foreign origin and already within the United States may spread to new locales. Pathways of both types include intentional as well as unintentional species transfers. Rates of species movement driven by human transformations of。