若α 1 ,α 2 ,…,α r 线性相关,β 1 ,β 2 ,…,β s 线性相关,则α 1 ,α 2 ,…,α r ,β 1 ,β 2 ,…,β s 线性相关.
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【判断题】In human and animal systems, trace elements are defined as being essential if depletion consistently results in a deficiency syndrome and repletion specifically reverses the abnormalities. The trace e...
【判断题】In human and animal systems, trace elements are defined as being essential if depletion consistently results in a deficiency syndrome and repletion specifically reverses the abnormalities. The trace e...
【判断题】The definition and inclusion for essential element are not the same in plant and animal systems.Because the trace elements essential for plants are those elements which cannot be substituted by others...