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问题 单项选择题

消息认证就是意定的接收者能够检验收到的消息是否真实的方法。消息认证又称为( )。

A．安全性校验

B．完整性校验

C．安全性校验

D．真实性校验

答案

参考答案：B

单项选择题

25岁男性胰岛素依赖型糖尿病患者，2天前中断胰岛素后出现昏迷，血糖420 mg/dl (23mmol/L)，经抢救并静脉滴注碳酸氢钠后血糖下降，神志好转，酸中毒减轻，但不久又进入昏迷，其最可能的原因是

A．并发脑水肿

B．并发低血糖

C．并发脑血管意外

D．并发乳酸酸中毒
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填空题

Questions 9-13


·You will hear one passage about science and daily life. Before you listen, read the list of statements, five of which are summaries of how science has changed man’s life. Then listen carefidly and match the statements (A-F) in the correct order (9-13). There is one extra statement that you don’t need to use. You will hear the passage twice.
  • A. Scientific discoveries are companied by the problem of air
    pollution.
  • B. Scientific discoveries have changed man’s moral atmosphere
    and caused ethical issues.
  • C. Scientific discoveries make people use available resources
    more efficiently.
  • D. Medical improvement has made people have a longer life
    span.
  • E. People can communicate with each other more easily.
  • F. Distance between two places is shorted with the advancement
    of transportation.
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