下列关于汽油供给系统的表述中，错误的是（）

A.采用高温水系统时，为保证热水系统正常运行需维持稳定的水力工况和保证系统中不发生汽化所需的压力，应设置定压设备B.在循环水泵运行时，应保证整个热水系统中高温水不发生汽化C.在循环水泵停止时，热水系统的静压线应低于勺系统直接连接用户的最高充水高度D.在循环水泵运行或停止时，与系统直接连接的用户室内系统的压力，不得超过散热器的允许压力

er to choose a good name than great riches. What you do not want done to yourself,do not do to others. Doing little things well is a step toward doing big things better. The road to success is dotted with many tempting parking places. It may be all right to be content with what you have, never with what you are. If you consistently do your best, the worst won’t happen. There could be no honor in a sure success, but much might be wrested from a sure defeat. What we acquire without sweat we give away without regret. Great works are performed not by strength but by perseverance. Bad men live that they may eat and drink, whereas good men eat and drink that they may live. （）

A．覆模板

B．滚涂板

C．氧化板

D．pvc板

A．10 A

B．16A

C．18A

D．20A

A．没食子酸内酯

B．丁基羟基茴香醚

C．特丁基对苯二酚

D．D- 异抗坏血酸

A．抗坏血酸棕榈酸酯

B．BHA

C．TBHQ

D．PG

A．≥90mmHg

B．≥100mmHg

C．≥110mmHg

D．≥120mmHg