A、Most benign tumors needn’t be called to the attention of a physician. B、People suffering from cancers were born with them. C、T

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问题  
W: When a systemic effect is desired, the drug enters the blood through absorption and is then distributed throughout body tissues.
M: And we know factors influencing tissue distribution of drugs include exercise and warming or chilling.
Q: What affects the drug’s distribution?
W: Are benign tumors always harmless?
M: In the study of tumors it should be born in mind that the terms "benign" and "malignant" are relative, and are often debatable in their application.
Q: Which of the following statement is true according to the talk?

选项 A、Most benign tumors needn’t be called to the attention of a physician.
B、People suffering from cancers were born with them.
C、The distinction between benign and malignant tumors is consequently always impossible.
D、Some tumors change their nature in the course of years, after a period of benign growth.

答案D

解析 男士认为“良性”和“恶性”是相对而言的,而且在实践中常存在争议。
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