题目

编码的意义和作用是什么？ 答案：解：1）鉴别：编码是对象的唯一标识 2）排序：编码的符号都具有一定的顺序，比较容易进行排序。 3）专用含义：编码一般都会包含一定的含义。Ⅷ．句型转换【1】We were at school yesterday．(改为否定句)We_______ ________at school yesterday．【2】What’s the weather like today?(用last Sunday改写句子)________ _________the weather like last Sunday?【3】Miss Smith was nice and friendly．(对画线部分提问)_______was Miss Smith________?【4】Mrs Gao was my first English teacher．(对画线部分提问)________ ________your first English teacher?【5】--Was your grandfather a teacher?(作否定回答)--No，________ _________．