listEning 5 "BiologyClAss"
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why ArE BACtEriA BEing usED in thE rEsEArCh stuDy At thE univErsity
A、BACtEriA hAvE unusuAl CEll FormAtions.
B、BACtEriA livE hArmlEssly on thE skin.
C、BACtEriA ArE similAr to othEr liFE Forms.
D、BACtEriA CAusE mAny DisEAsEs in humAns.