The word "odds" in Line 1 of Paragraph 1 means ______.
A. happiness
B. preferences
C. chances
D. capability
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The author' s purpose in writing this article is to ______.
A. inform readers of Heller' s findings in his researches
B. persuade readers to get enough sleep at different ages
C. show readers the importance of getting enough sleep
D. tell readers how many hours of sleep they should get
The phrase "such powerful effects" in Line 3 of Paragraph 3 refers to ______.
A. the fact that many people cannot sleep and wake refreshed
B. the fact that the brain puts us to sleep when we are worn out
C. your sight, hearing, and attention are slow to alert you to dangers
D. increased risk of health problems or a serious, even deadly accident
在数据库应用系统生命周期中，系统设计完成后就进入到系统实现与部署阶段。下列关于数据库应用系统实现与部署阶段工作的说法，错误的是______。
A. 此阶段会根据数据库逻辑结构和物理结构设计方案以及项目选择的数据库管理系统，编写相关脚本生成数据库结构
B. 此阶段会将用户原有数据按照新的数据结构导入到新系统中
C. 此阶段会进行应用系统编码和编码测试，编码测试可以使用白盒测试方法也可以使用黑盒测试方法
D. 此阶段如果发现系统的功能、性能不满足用户需求，应尽快进行系统升级工作
It can be inferred from the passage that ______.
A. people of an older age are more likely to suffer from deficient sleep
B. the older one becomes, the more sleep he or she will need every night
C. everyone of us needs to have seven or eight hours of sleep every night
D. even if we are tired, we can still react quickly as soon as we find dangers
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