题目内容

adj. (especially of a disease) lasting for a long time. (c______)

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n. any substance (such as a toxin or other foreign substances) that stimulates an immune response in the body (especially the production of antibodies). ( a______)

n. any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response. (a_______)

adj. of or relating to the dead body of a human being. (c_____)

n. a tissue or organ that is grafted into a new position on the same body of the individual. (a_____)