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（1）Gutman argues convincingly that the stability of the Black family encouraged the transmission of—and so was crucial in sustaining—the Black heritage of folklore, music, and religious expressions from one generation to another, a heritage that slaves were continually fashioning out of their African and American experiences.
（2）With the conclusion of a burst of activity，the lactic acid level is high in the body fluids, leaving the large animal vulnerable to attack until the acid is reconverted, via oxidative metabolism, by the liver into glucose, which is then sent in part back to the muscles for glycogen resynthesis.
（3）Even the folk knowledge in social systems on which ordinary life is based in earning，spending,organizing, marrying, taking part in political activities, fighting and so on, is not very dissimilar from the more sophisticated images of the social system derived from the social sciences, even though it is built upon the very imperfect samples of personal experience.
（1）英语语法中有几种时态，分别是什么形式？
（2）雅思写作、口语中经常使用的逻辑连接句（短语）有哪些？
