The lifespan of session key is longer than that of master key. ( )

. The lifespan of master key is usually longer than that of session key. ( )

The lifespan of session key is usually longer than that of master key. ( )

【题干】An extended lifespan in the future will allow people to have more careers than now.

观看lead-in第一个视频并思考：视频中对比了不同国家"典型"人民在哪几个方面的特征？ A: lifespan B: weight C: height D: use of water E: amount of waste F: appearance

An extended lifespan in the future will allow people to have more careers than now. A: A B: B C: C D: D E: E F: F G: G H: H I: I J: J K: K L: L M: M N: N

What is the purpose of the reading? （Text 8B) A: to revise the lifespan estimates for three cultures with high longevity B: to compare three cultures and rank in terms of longevity C: to investigate three cultures with high longevity and discover their habits D: to expose the myths about three famous cultures with high longevity

What topics will you cover A: What ADHD is, and the controversies raised by the concept of ADHD B: Latest neuroscientific and psychiatric research based on the C: ADHD as a developmental disorder throughout the lifespan: genes, environments (protective and risk factors) D: Latest neuroscientific and psychiatric research based on the mechanisms, diagnosis and treatment of adult ADHD

Through burial and ancestral worship rituals, people can learn that ___________. A: Nature is lifeless so it will never die B: Individual’s life can be everlasting by joining nature. C: They should be grateful to their parents for giving them lives. D: Individual’s lifespan is short, so they should enjoy life as much as possible.

Astronauts might benefit from substance that can convert into NAD+ inside the cell because A: NAD+ can rejuvenate the body B: NAD+ can enhance the ability to repair DNA damage C: NAD+ can slightly prolong the lifespan D: NAD+ can boost the modification of skin, brain and muscle stem cells