工商行政管理部门办理哪些财产的抵押登记？抵押登记的效力如何？

How I wish I _______ with my mother yesterday and that she _____ me like a grown-up![ ]

A. didn't quarreled; treats

B. hadn't quarreled; treated

C. wouldn't quarrel; treated

D. shouldn't quarrel; treated

（1）准备支票

（2）咨询价格

（3）购买计算机

（4）挑选品牌

（5）咨询机器性能

（）

A．2 - 1 - 4 - 5 - 3

B．3 - 2 - 4 - 1 - 5

C．3 - 2 - 4 - 5 - 1

D．2 - 4 - 3 - 5 - 1

汽机转速低于（）r/min时联动交流润滑油泵。

使用煤气前应注意什么？