contamination（）

沾染contamination(名词解释)

食品污染(food contamination)

A.total dissolved solids

B.salt contamination

C.water harcness

D.chlorine contamination

A.包含

B.联络

C.污染

D.一致

A.Especially packaging

B.Vacuum packaging

C.External packaging

D.Common packaging

A.fluid friction

B.fluid turbulence

C.component misalignment

D.pressure surges

• Now a paper in Science argues that organicchemicals in the rock come mostly from _______ on earth rather than bacteria onMars.

  A) configuration B) constitution

  C) condemnation D) contamination