已知aX n+ 和bYm－两种离子的电子层结构相同，则下列关系成立的是（） A．

(71) analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the (72) for designing and constructing an improved system. (73) is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called (74) 、 (75) is another such technique that integrates data and process concerns into constructs called objects.

（74）应选（）。

A．PERT

B．DFD

C．ERD

D．UML

有理数5.614精确到百分位的近似数为______．

最小合数的倒数是______．

图中的实线表示电场线，虚线表示只受电场力作用的带电粒子的运动轨迹，粒子先经过M点，再经过N点，可以判定（　　）

A．M点的电势大于N点的电势

B．M点的电势能小于N点的电势能

C．粒子可能带负电

D．粒子在M点的动能小于在N点的动能

商业银行应建立外部监事制度，对董事会、董事、高级管理层及其成员进行监督。