填空题

Recent findings also indicate that ______ helps us keep memory at its height.

【参考答案】

constant intellectual stimulation

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热门试题

填空题

Elderly people retain their ability to remember information briefly but are unable to turn it into ______.

问答题

能源是当今人们最关心的重大问题之一。 2. 节约使用是缓解能源短缺的手段之一。 3. 但最好的解决办法是开发新的能源。