题目内容
预检的目的是检验检疫机构为了方便对外贸易，检验检疫机构根据需要和可能对某些品质较为稳定、非易腐易烂的出境货物预先接受检验检疫。是防止内地不合格货物运抵口岸的一项有效措施。()
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听力原文： As every schoolboy knows, the most important raw materials of industry are coal, oil and iron. But, as every business man knows, the most important real material of all is the school boy. Today U. S. industry is faced with a light shortage of such manpower, it needs not only more but better trained college graduates. To help get them, many a businessman believes that corporations must provide much of the cash needed by colleges to expand their facilities and improve their teaching, and work more closely with colleges on business needs. Industry and education have not always recognized this. While there're a few businessmen wire still regard college professors as fuzzy minded and likely to be radicals and a few educators who still look on businessmen as money- grabbers, the mutual distrust has generally disappeared in the mutual need. The rapidly expanding U. S. economy has made college graduates more important than ever to industry. In turn, universities must depend on corporations for contributions since high taxes have ill effect on the big individual contributions that built the private school.
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A．Mary Mallon died in hospital.B．Mary Mallon did not pass on typhoid.C．Food cleanlines
A．Lincoln, Eisenhower and Richard Nixon respectively held the presidency in the USA.B．
听力原文： The classic case in medical history of a typhoid carrier is that of Mary Mallon. During a New York typhoid epidemic she was found working as a cook and thus very readily spread the disease to others. She persisted in finding employment as a cook both in private service and in various institutions. She even changed her name to avoid detection. For eight years she continued to carry and spread typhoid wherever she went. Finally she was made to live in a hospital. There her work could be regulated so that she did not pass on typhoid. She lived in hospital for twenty-three years, until her death in 1938. For thirty-one years she had been a known carrier of the disease without herself suffering any ill effects.
(30)
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