(4分)某同学为探究可燃物燃烧的条件，他查阅资料得知：白磷的着火点为40℃，红磷的着火点为240℃，它们在空气中燃烧都会产生白烟——五氧化二磷，五氧化二磷易溶于水，并能与水反应。

(1)他按右图所示装置进行实验，观察到的现象是铜片上的白磷燃烧产生白烟，铜片上的红磷和热水中的白磷不燃烧。根据实验得出可燃物燃烧的条件是                  。

(2)欲使白磷在热水中燃烧，可采用的方法是              ，白磷完全燃烧后，往烧杯中滴入几滴石蕊试液，溶液呈红色，证明五氧化二磷与水反应所得溶液的pH       7(填“>”“=”或“<”)，

(3)实验时不慎将酒精灯碰倒，洒出的酒精在桌面上燃烧，应立即用湿抹布盖灭。其灭火原理是 _________________。

How should change management be planned for ？（）

A．Changes are generally not predictable，therefore planning for change management cannot be sensibl

B．Planning for change management should be done while the various change control processes are being applie

C．Change management can be planned in a set of management plans or a specific change management pla

D．Changes are a sign of bad planninOne should avoid changes during a project thus eliminating the need to manage the