听力原文: One of the most popular myths about the United States in the 19th Century was that of the free and simple life of the farmer. It was said that the farmers worked hard on their own land to produce whatever their families needed. They might sometimes trade with their neighbors, but in general they could get along just fine by relying on themselves, not on commercial ties with others. This is how Thomas Jefferson idealized the farmer at the beginning of the 19th century. And at that time, this may have been close to the truth, especially on the frontier. But by the mid-century, sweeping changes in agriculture were well underway as farmers began to specialize in the raising of crops such as cotton or corn or wheat. By late in the century, revolutionary advances in farm machinery had vastly increased production of specialized crops and an extensive network of railroads had linked farmers throughout the country to markets in the east and even overseas. By raising and selling specialized crops, farmers could afford more and finer goods and achieve a much higher standard of living.
Now farmers were no longer dependent just on the weather and on their own efforts, their lives were increasingly controlled by banks, which had power to grant or deny loans for new machinery, and by the railroads which set the rates for shipping their crops to market. As businessmen, farmers now had to worry about national economic depressions and the influence of world supply and demand on the price of wheat. So by the end of the 19th century, the era of Jefferson's independent farmer had come to a close.
(33)
A.Improvements in farm machinery in the United States.
B.Farmers' loss of independence.
C.Jefferson's views about commercialized agriculture.
D.International trade in the nineteenth century.
第2题
新生儿颅内出血,腰穿脑脊液为血性,考虑为
A.硬膜下出血
B.蛛网膜下腔出血
C.脑实质出血
D.脑室周围出血
E.小脑幕下出血
第4题
足月新生儿生后不久激惹脑性尖叫,惊厥见于
A.小脑幕上硬膜下出血
B.小脑幕下出血
C.脑室内室管膜下出血
D.脑室内脉络膜丛出血
E.脑实质出血
第5题
以下颅内出血类型哪项最常发生在极低出生体重儿()
A、小脑出血
B、硬膜下出血
C、脑实质内出血
D、蛛网膜下腔出血
E、脑室周围-脑室内出血
第6题
足月新生儿生后意识障碍,呼吸不规则,阵发性呼吸暂停肌张力低下见于
A.小脑幕上硬膜下出血
B.小脑幕下出血
C.脑室内室管膜下出血
D.脑室内脉络膜丛出血
E.脑实质出血
第7题
B、新生儿低钙血症
C、新生儿低血糖
D、胆红素脑病
E、新生儿颅内出血
为明确诊断,首选的实验室检查是A、胸片
B、血培养
C、头颅CT
D、腰穿查脑脊液
E、肝功能
若脑脊液呈血性,提示存在颅内出血,其部位可能在A、硬脑膜下
B、蛛网膜下腔
C、小脑幕
D、脑实质
E、小脑幕与大脑镰交接处
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