Part IV TranslationYet these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful

An additive used to improve the ability of a lube oil to reduce friction is known as a/an

A.suppressant additive

B.dispersant additive

C.extreme pressure additive

D.viscosity improver additive

相加作用(additive effect)

A．the affected individual never worked with any carcinogenic material

B．the cancer was actually caused by a long-ago exposure

C．the size of the cluster is too small to be meaningful

D．the cancer actually arose in a different geographic location

The word "carcinogenic" most nearly means______.

A．trouble-making

B．color-retaining

C．money-making

D．cancer-causing