考研每日一练（2019/7/22）

第1题：批处理系统的{{U}}主要优点{{/U}}是系统的吞吐量大、资源利用率高、系统的开销较小。()

【判断题】： 对    错

第2题： 当APL为正但递减时，MPL是( )。 A．递减 B．负的 C．零 D．以上情况均有可能

【单选题】： A     B     C     D

第3题：下列除哪项外，均为心血不足型心悸的主症 A．善惊易恐 B．心悸头晕 C．面色不华 D．倦怠无力 E．脉结代而心动悸

【单选题】： A     B     C     D     E

第4题：

【单选题】： A     B     C     D

第5题：某人选择职业时，有多个单位可供选择，举棋不定时的冲突是()。 A．双趋冲突 B．双避冲突 C．趋避式冲突 D．多重趋避式冲突

【单选题】： A     B     C     D

第6题：单项选择

【单选题】： A     B     C     D

第7题： 波特的产业竞争力模型中的5种力量是：潜在进入者的威胁、买方讨价还价的能力、行业中现有企业的竞争、供应商讨价还价的能力和________。 A．退出者的转换成本 B．替代的进入者威胁 C．替代品或服务的威胁 D．政府的影响

【单选题】： A     B     C     D

第8题：The pursuit of information has been a human preoccupation since knowledge was first recordeD、In the 3rd centuryB C、Ptolemy stole every (1) scroll from passing travellers to (2) his great library inAlexandriA、After 2001America (3) a program to compile as many data as possible about just about everything. Since 1996Brewster Kahle has been (4) all the content on the web as a not-for-profit (5) called the "InternetArchive". It has (6) expanded to software, films, audio recordings and scanning books. There has always been more information than people can mentally process. The disparity between the amount of information and man’s ability to deal with it may be (7) , but that need not be a cause for (8) Our sensory and attentional systems are tuned to be (9) People find patterns to compress information and make it manageable. (10) Commander Schmorrow does not think that man will be (11) by robots. "The flexibility of the human to consider as-yet-unforeseen (12) during critical decision-making, go (13) the gut when problem-solving under uncertainty and other such (14) reasoning behaviours will not be readily replaced by a computer," he says. The (15) of data now available is a resource, similar to other resources and even to technology itself. (16) , resources and technologies are neither good nor bad; it depends on how they are (17) . In the age of big data, computers will be monitoring more things, making more decisions and even (18) improving their own processes--and man will be left with the same (19) he has always faceD、 (20) T.S.Eliot asked: "Where is the wisdom we have lost in knowledge Where is the knowledge we have lost in information \ A．demands B．consequences C、circumstances D．origins

【单选题】： A     B     C     D

第9题：

【单选题】： A     B     C     D

第10题：The food you eat does more than provide energy. It can have a dramatic effect on your body’s ability to fight off heart disease, cancer, diabetes, high blood pressure, stroke, and weak bones. With remarkable consistency, recent research has found that a diet high in plant-based foods—fruits, vegetables, dried peas and beans, grains, and starchy staples such as potatoes—is the body’s best weapon in thwarting many health-related problems. These foods work against so many diseases that the same healthy ingredients you might use to protect your heart or ward off cancer will also benefit your intestinal tract and bones. Scientists have recently estimated that approximately 30 to 40 percent of all cancers could be averted if people ate more fruits, vegetables, and plant-based foods and minimized high-fat, high-calorie edibles that have scant nutritional value. Up to 70 percent’ of cancers might be eliminated if people also stopped smoking, exercised regularly, and controlled their weight. In the past, researchers had linked fat consumption with the development of cancers, but they currently believe that eating fruits, vegetables, and grains may be more important in preventing the disease than not eating fat. "The evidence about a high-fat diet and cancer seemed a lot stronger several years ago than it does now," says Melanie Polk, a registered dietitian and director of nutrition education at theAmerican Institute forCancer Research. The road to strong bones is paved with calcium-rich fooD、Leafy green vegetables and low-fat dairy products are excellent sources of calcium, the mineral that puts stiffness into your skeletal system and keeps your bones from turning rubbery and fragile. Your body uses calcium for more than keeping your bones strong.Calcium permits cells, to divide, regulates muscle contraction and relaxation, and plays an important role in the movement of protein and nutrients inside cells. If you don’t absorb enough from what you eat to satisfy these requirements, your body will take it from your bones.Because your body doesn’t produce this essential mineral, you must continually replenish the supply.Even though the recommended daily amount is 1,200mg, most adults don’t eat more than 500mg. One reason may have been the perception that calcium-rich dairy products were also loaded with calories. "In the past, women, in particular, worried that dairy products were high in calories," says Letha Y. Griffin, M.D、, of Peachtree Orthopaedics inAtlantA、"But today you can get calcium without eating any high-fat or high-calorie foods by choosing skim milk or low-fat yogurt."Also, low-fat dairy products contain phosphorous and magnesium and are generally fortified with vitaminD, all of which help your body absorb and use calcium. If you find it difficult to include enough calcium in your diet, ask your doctor about supplements. They’re a potent way to get calcium as well as vitaminD、and other minerals.But if you rely on pills instead of a calcium-rich diet, you won’t benefit from the other nutrients that food provides. Getting the recommended vitaminD、may be easy, since your body makes the vitamin when your skin is exposed to the sun’s rays. ______percent of all cancers could be averted if people ate more fruits, vegetables, and plant-based foods and minimized high-fat, high-calorie edibles.A．30-40 B．40-50 C．50-60 D．60-70

【单选题】： A     B     C     D