答案:C
解析:
Choice C is the best answer because it provides the most effective introduction to the paragraph's main topic. It identifies the researchers' specific goal for the experiment described in the paragraph.
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答案:C
解析:
| 重点单词 | 查看全部解释 | |||
| institute | ['institju:t] | 联想记忆 | ||
| determine | [di'tə:min] | 联想记忆 | ||
| effective | [i'fektiv] | 联想记忆 | ||
| institutional | [.insti'tju:ʃənəl] | |||
| fascinating | ['fæsineitiŋ] | 联想记忆 | ||
| chimpanzee | [.tʃimpæn'zi:] | |||
| cognitive | ['kɔgnitiv] | |||
| effectively | [i'fektivli] | |||
| delay | [di'lei] | |||
| gratification | [.grætifi'keiʃən] | 联想记忆 |