96000000平方米=（ ）公顷=（ ）平方千米
12平方米=（ ）平方分米=（ ）平方厘米
9600；96；1200；120000
焊接过程中，焊机的负载总是在不断地变化着，如引弧时要先（）再提起焊条形成电弧。
Software architecture reconstruction is an interpretive, interactive, and iterative process including many activities. (1) involves analyzing a system's existing design and implementation artifacts to construct a model of it. The result is used in the following activities to construct a view of the system. The database construction activity converts the (2) contained in the view into a standard format for storage in a database. The (3) activity involves defining and manipulating the information stored in database to reconcile, augment, and establish connections between the elements. Reconstruction consists of two primary activities: (4) and (5). The former provides a mechanism for the user to manipulate architectural elements, and the latter provides facilities for architecture reconstruction.
空白（5）处应选择（）
A.pattern definition and recognition
B.architecture design and implementation
C.system architecture modeling
D.dynamic modeling and reconstruction
