夫诗以声教也取其可歌可咏可长言嗟叹至手舞足蹈而不自知以感竦其兴观群怨事父事君之心且将从容以紬绎夫鸟兽

A. The Royal family had never eaten potatoes before 1619.
B. Potatoes have been the main food of the British.
C. The Irish had lived on the potatoes during the last two centuries.
D. The potato has been an important item of British diet.

A. 实例关系
B. 泛化关系
C. 聚合关系
D. 依赖关系

A. extends
B. implements
C. generalization
D. realization