门座式起重机吊运长形货物，必须保持（）。

下列各项属于科目汇总表账务处理程序优点的有（）。

A.总分类账可以比较详细地反映经济业务的发生情况

B.大大减少登记总分类账的工作量

C.可以清晰反应科目之间的对应关系

D.具有试算平衡的作用，有利于保证总账登记的正确性

用所给词的适当形式填空。

1. It has ____________ (comfortable) ___________ (sit).

2. What's ____________ (good) radio station in town?

3. Town Cinema is ____________ (close) to home of the three cinemas.

4. She slept late, when she arrived school, the teacher was already in the classroom.

    What's ____________ (bad), she ___________ (forget) to bring her book.

5. He is No.1 in the ______________ (music) group.

   He is a _____________ (talent) musician.

6. It often __________ (rain) in the ____________ (south) part of the country.

7. He is four years ___________ (old) than his younger brother.

8. His __________ (old) sister is two years older than him.

9. I think Dennis is ____________ (creative) _____________ (perform)

    at the school ____________ (talented) show. He could play ____________ (guitar) upside down.

10. Jet Li is a _____________ (success) movie star.

11. Last week's talent show was a great ____________ (succeed).

12. It has ___________ (friendly) service.

13. Harbin is ___________ (far) city of the three  ___________ (city).

14. Fish will die (死) __________ (with) water.

15. It was interesting ___________ (hear) what the class ___________ (think) about action movies.

关系中的“主码”不允许取空值是指______约束规则。

A．实体完整性

B．引用完整性

C．用户定义的完整性

D．数据完整性

显晶质

群体规范的基本作用是对成员具有（）的作用。

A、吸引

B、比较和评价

C、助长

D、凝聚