当告警窗显示“整流器故障告警”时，应查看（）设备的信息。A、开关电源 B、进线柜 C

Ravi, like many project (1) , had studied the waterfall model of software development as the primary software life-cycle (2) . He was all set to use it for an upcoming project, his first assignment. However, Ravi found that the waterfall model could not be used because the customer wanted the software delivered in stages, something that implied that the system had to be delivered and built in (3) and not as (4) .

The situation in many other projects is not very different. The real world rarely presents a problem in which a standard process, or the process used in a previous project, is the best choice. To be the most suitable, an existing process must be (5) to the new problem.

A development process, even after tailoring, generally cannot handle change requests. To accommodate change requests without losing control of the project, you must supplement the development process with a requirement change management process.

（4）处填（）。

A．parts

B．modules

C．software

D．a whole

A～H是初中化学常见的物质。已知A为黑色固体单质，G为紫红色固体单质，B为红棕色粉末，F为黑色粉末，它们的转化关系如下图所示。请回答：

（1）B的化学式为________，F的化学式为________。

（2）A、C、E三种物质中，具有还原性的是________、________（填化学式）。

（3）反应①的化学方程式为________________________；写一个能实现反应③的化学方程式________________________。

（4）反应①～④中涉及的化学反应基本类型有________、________。

下面结节病的X线表现中，错误的是()

A．可见指骨囊性病变

B．肺门淋巴结也肿大

C．有时纵隔淋巴结也肿大

D．在肺野可见索条、颗粒、斑状阴影，呈离心分布

E．多两肺受累

油雾化特性的主要指标有哪些？

承兑最长期限不得超过1年。