向一定质量的稀硫酸中逐滴加入氢氧化钡溶液，直至过量。下图横坐标表示加入氢氧化钡溶液的质量/克，根据曲线判断，在图中的轴是指（ ）

A．溶液的

B．溶质的质量分数／％

C．沉淀的质量/克

D．溶剂的质量/克

The identification, definition and selection of the project objectives, as well as the best approach to achieving the project objectives, are identified in the ______ process of the project and documented in the project ______ .

A) initiation (authorization), charter
B) initiation (authorization), scope statement
C) scope definition, scope statement
D) scope planning, charter