A management information system （） the business managers the information that they need to make decisions. Early business computers were used for simple operations such （） tracking inventory, billing, sales, or payroll data, with little detail or structure. Over time. these computer applicationsbecame more complex, hardware storage capacities grew, and technologies improved for connecting previously （） applications. As more data was stored and linked, managers sought greater abstraction as well as greater detail with the aim of creating significant management reports from the raw, stored （） . Originally，the term "MIS" described applications providing managers with information about sales, inventories, and other data that would help in （） the enterprise. Over time, the term broadened to include：decision support systems，resource management and human resource management，enterprise resource planning(ERP), enterprise performance management(EPM), supply chain management(SCM)，customer relationship management(CRM)，project management and database retrieval applications．

A management information system （） the business managers the information that they need to make decisions.

A．brings

B．gives

C．takes

D．provides

(10分)向一个固定体积的密闭容器充入2 mol A和1 mol B，发生如下反应：

2A(g) + B(g)3C(g) + D(g)，2分钟后，反应达到平衡，C的浓度为1.2 mol/L。

(1)用A表示2分钟内平均反应速率               ，A在第1分钟平均速率     第2分钟平均速率（填“<”、“>”、“=”）。

(2)器温度升高，平衡时混合气体的平均相对分子质量减小，则正反应为________（填“吸热”或“放热”）反应。

(3)大B的转化率，可采取的措施是_________（用序号填空）

①加入A                                      ②加入B  ③加压  ④再加入1.6 mol A+ 0.8 mol B ⑤将C分离出容器

(4)体积可变，维持容器压强和温度不变，按下列方法加入起始物质，达到平衡时C的浓度仍为1.2 mol/L的是_________（用序号填空）

①4 mol A + 2 mol B                     ②3mol C + 1 mol D + l mol B

③3 mol C + 2 mol D                  ④1.6 mol A+ 0.8 mol B + 0.6 mol C + 0.2 mol D