第13题: [单项选择]The purpose of the author in mentioning the three researches is to ______. A. make a contrastive analysis of them B. illustrate the achievements in cancer therapy C. present the similarities and differences between them D. show how altered genes can cause cancer 参考答案:B 答案解析:[解析] 本题参阅前两题的解析。
第14题:[单项选择]<br><br><br/>A.herself<br/>B.theworld<br/>C.himself<br/>D.herown<br/>参考答案:D 答案解析:of one's own“自己的,特有的”,注意:这个词组应置于名词之后。例:I want a room of my own.。