According to the passage, Germany is most likely to achieve its leading position in Europe through ______.

单项选择题The relatively low income of the commercial farmers is mainly caused by ______.

单项选择题According to the passage, which of the following statements is CORRECT

单项选择题Which of the following is common to Roger Bacon, Francis Bacon and Descartes

单项选择题As can be gathered from the passage, Aristotle's theories ______ in the Middle Ages.

单项选择题If refrigerated, USDA eggs will remain good for ______ weeks from the date stamped.