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选词填空 daydreaming, decision-making, English-speaking;hand-wriitng, sight-seeing, sunbathing4. A scientific finding reveals that ____________ does good to people’s mental health.

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选词填空 daydreaming, decision-making, English-speaking;hand-wriitng, sight-seeing, sunbathing5. Most of the delegates who will make speeches at the conference are from ________________ countries.

选词填空 daydreaming, decision-making, English-speaking;hand-wriitng, sight-seeing, sunbathing6. Success in stock investment often demands swift judgment and rapid ________________.

某学校的成绩管理软件属于________。

A. 工具软件
B. 应用软件
C. 系统软件
D. 字处理软件

计算机在工作中电源突然中断，则计算机中________全部丢失，再次通电后也不能恢复。

A. U盘中的信息
B. ROM中的信息
C. RAM中的信息
D. 硬盘中的信息