21 After they kill germs, antibodies stay in the body.A Right B Wrong C Not me

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问题

21 After they kill germs, antibodies stay in the body.

选项 A Right
B Wrong
C Not mentioned

答案A

解析倒数第二段倒数第三句就说到“致病菌被消灭以后，抗体仍存在体内”。

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