12. “melanoma” means ___.
A. a newborn
B. through the skin
C. loss of color in the skin
D. dark tumor
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二、Multiple ChoiceDirections: Choose the best answer from the four choices.11. Monoclonal refers to a colony (clone) derived from ___ cell(s).
A. three
B. two
C. half
D. one
9. ['sʌpləmənts]增补营养片剂______