2. 职称英语
  3. Histocompatibility antigens that attack foreign tissue in the body cannot have b

Histocompatibility antigens that attack foreign tissue in the body cannot have b

游客2025-02-20  35
问题 Histocompatibility antigens that attack foreign tissue in the body cannot have been (i)____ through evolution expressly to (ii)____ organ transplantation; on the contrary, they have been found to facilitate many essential biological functions.
选项 A、designed...retain
B、produced…aid
C、developed…enhance
D、selected…promote
E、conserved…foil
答案 E
解析 空格(ii)：
- 方程等号：分号，同义重复；cannot取反。
- 强词和时应：分号后强调facilitate，分号前也强调facilitate。空格(ii)对应facilitate根据cannot取反，填入一个负向词。retain保持，aid帮助，enhance增加，promote促进，foil破坏。选项E合适。
空格(i)：
- 方程等号：through表示方式方法，同义重复。
- 强词和对应：空格(i)和空格(ii)通过through取同，体现“不促进”。design设计(错)，produce生产(错)，develop发展(错)，select选择(错)，conserve保存(对)。综合空格(ii)，答案选E。
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