The following diagram denotes dependency between two activities A and B,It says（）

A．B can’t start before A is finished

B．B can’t finish before A is finished

C．B can’t start before A starts

D．B can’t finish before A starts

[单选题]the following diagram is（） network topology structureA．busB．starC．ringD．tree

[单选题]The following diagram illustrates a market that had been in equilibrium at

[名词解释] 抚养比(dependency ratio)

[单选题]N-S diagram can used to substitute conventional program flow Chart．In the following phrases，Which does not belong to the basic control structures that contain?A．sequence structureB．condition StructureC．selection structureD．execution structure

[单选题]( ) is a method used in Critical Path Methodology for constructing aproject

[单选题]The diagram to the right shows the domestic demand and supply curves for a

[单选题]在UML类图中，类与类之间存在依赖(Dependency)、关联(Association)、聚合(Aggregation)、组合(Composition)和继承(Inheritance)5种关系，其中，(45)关系表明类之间的相互联系最弱，(46)关系表明类之间的相互联系最强，聚合(Aggregation)的标准UML图形表示是(47)。A．依赖B．聚合C．组合D．继承

[试题] 在UML类图中，类与类之间存在依赖（Dependency）、关联（Association）、聚合（Aggregation）、组合（Composition）和继承（Inheritance）五种关系，其中，（45）关系表明类之间的相互联系最弱（46）关系表明类之间的相互联系最强，聚合（Aggregation）的标准UML图形表示是（47） 。

[多选题] 亲和图(Affinity Diagram)可应用于以下场合（）A . 选择最优方案B . 用于归纳思想，提出新的构思C . 整理顾客需求D . 评价最优方案

[单选题]The payoff diagram of portfolio insurance (owning a stock and a put) has th