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关于职业纪律，正确的认识是()。
实证研究方法重点是研究现象本身()的问题。
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现代人力资源管理的原则说法中错误的是()。
For more than a decade, dieticians and nutritionists harangued us to lower the amount of fat in our diet. As it hap pens, their message was only partly correct. Although all fats are high in calories, certain fats, like the omega-3 fatty acids commonly found in fish, are actually good for us, provided we consume them in moderation. Not only do omega-3s reduce the risk of clot formation in blood vessels, they also lower the amount of triglycerides, another fatty substance in the blood. The bottom line is that folks who eat 6 to 8 oz. of fatty fish a week experience significantly fewer heart attacks and strokes.
Still on the consume-sparing lists are saturated fats, commonly found in red meats and whole-milk dairy products. Recent studies also suggest that another group fats, called trans-fatty acids, found in abundance in crackers and cookies prepared with hydrogenated oils, may be an even more dangerous promoter of high cholesterol than saturated fats.
The most immediate benefit from adopting a healthy diet is that it can lower blood pressure. Even ff you don't have hypertension, decreasing your blood pressure makes your blood vessel springier and can help stabilize potentially dangerous plaques in the arteries. Two major studies have shown that DASH(Dietary Approaches to Stopping Hypertension) diet—which emphasizes fruits and vegetables, promotes low-fat dairy and high-fiber grains, permits modest portions of lean meat and reduces sodium intake can lower blood pressure as effectively as taking a prescription anti-hypertension drug. Just as important, the foods are filling, taste good and aren't that different from what most Americans are used to eating.
Which of the following is the best title for the passage？
A．control of natural hazardsB．control of heavy trafficC．control of heart diseaseD．cont
听力原文： Today I'm going to discuss transportation and communication in the early 19th century in the United States. At that time, inland waterways provided North America's most popular form. of long distance transportation. Travel by river was often more convenient than taking a wagon over primitive country roads, especially when shipping heavy loads of farm products or household goods, Where the natural water ways were inadequate, shallow canals were built. The Erie Canal, opened in 1825, connected the Great Lakes with the upper Hudson River. It allowed settlers in the Great Lakes region to send their crops eastward to New York City at the mouth of the Hudson at a much lower cost. From there, crops could be shipped to other Atlantic ports. The construction of the Erie Canal also encouraged westward migration along inland waterways and helped populate the frontier. The City of Detroit grew up between two of the Great Lakes. Later a canal joined the Great Lakes with the Mississippi river system and Chicago became a thriving city. Politically the waterway system united the nation in a way few had imagined possible. By the mid-1800's faster and cheaper railroads became more popular and the canal system de dined. Railroads could be used year round whereas canals were often frozen in the winter. During the first third of the century, however, transportation on rivers, lakes and canals aided greatly in the growth of the United States. Next week we'll discuss the railroads in greater detail.
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