物业管理与社区文化的关系包括( )。 A．互为促进 B．互为约束 C．互为条件 D

— Did you return the book to me? Why can’t I find it anywhere?

— ________. You were writing a letter at your desk at that time.

A．I will give it to you

B．I did give it to you

C．I had given it to you

D．I do give it to you

若X与Y互质，那么7X与14Y的最小公倍数是14XY．______．

塔顶冷网流属于（）。

A．外回流

B．内回流

C．热回流

D．循环回流

为减轻Kennedy第一、第二类缺损者游离端基牙的负担，除采用RPI卡环以外，还可采用

A．对半卡环
B．延伸卡环
C．圈形卡环
D．回力卡环
E．圆环形卡环

在平行登记方法下，在总分类账和明细账中，只需选择一个账户进行登记。