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问题 填空题

数据库管理系统能实现对数据库中数据的查询、插入、修改和删除，这类功能称为______。

答案

参考答案：数据操纵功能

解析： 数据定义功能包括创建表、修改表及对列属性的定义，以及删除表。数据控制功能包括对象操作权限的控制。数据操纵功能则包括数据的查询、插入、修改和删除。

单项选择题

某点以西是西半球，以东是东半球，以南有阳光直射现象，以北为温带，则该点的地理位置是（）

A.23.5°N，160°E

B.66.5°N，160°E

C.23.5°S，180°

D.23.5°N，20°W
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填空题

Questions 9-13


·You will hearfive people giving reasons why children learn their mother tongue so well.
·Before you listen, read the list of statements, five of which are summaries of what they were saying.
·Then listen carefully and match the statements (A-F) with the people who said them (9-13) respectively.
·There is one extra statement that you don’t need to use. You will hear the passage twice.
9. Maggie: ______
  • A. The time of their learning the mother tongue is the most
    favorable of all.
    10. Cherry: ______
  • B. Children hear their native language spoken always in its
    genuine form.
    11. Mike: ______
  • C. Children have private lessons all the time to learn their mother
    tongue.
    12. Hazel: ______
  • D. Children hear their native language spoken in all possible
    situations.
    13. Jody: ______
  • E. Children have special teachers to teach them.
  • F. Children have flexible organs and sensitive ear.
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