listEning 5 "BiologyClAss"
{$mEDiAurl}


whAt AspECt oF BACtEriA is this lECturE mAinly ABout
A、how miCrosCopiC orgAnisms ArE mEAsurED
B、thE usE oF BACtEriA For rEsEArCh in gEnEtiCs
C、DisEAsEs CAusED By BACtEriAl inFECtions
D、thE thrEE mAjor typEs oF BACtEriA