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问题 单项选择题

衡量一个国家或地区保险市场发达程度的常用指标是（）。

A.保费规模和保险深度

B.保险密度和保险深度

C.保费规模和保险密度

D.保险金额和保障成份

答案

参考答案：B

选择题

流经生态系统的总能量是指（　　）

A．照射到该系统的全部太阳能

B．照射到该系统所有植物体上的全部太阳能

C．该系统所有生产者固定的全部太阳能

D．生产者传递给消费者的全部太阳能
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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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