【单选题】为了保证数据库的逻辑独立性,需要修改的是( )
【简答题】According to Steffens, practicing yoga [A] helps exercisers remain young. [B] is very effective in relievingback pains. [C]helps exercisers realize thepotentials of their bodies. [D] are good for form...
【单选题】要保证数据库的逻辑独立性,需要修改的是( )
【单选题】Yoga helps to make your body and mind _____
【单选题】要保证数据库的逻辑独立性,需要修改的是( )。
【多选题】以下哪些能源不属于清洁能源的范畴( )。