a

回归方程中 y=a+bx，参数 a、b 在社会经济现象中代表什么意义 ?

D /A转换器的作用是将数字信号转换成__    ____ 。

8255A有3种工作方式，其中____________只允许端口A使用。

Tom likes animals very much. He __________ wants to keep a pet snake.

Having heard so much about Mr. Smith, they were _______ to meet and have a chat with him.

How close parents are to their children ____ a strong influence on the character of the children

After the war, a new school building was put up _____ there had once been a theatre.

Excuse me for _____ you with such a small matter.

A lot of _______ must be made to the economic system.

Could I borrow your car for a few days? _____________.