With a lot of modern buildings _______, today’s cities are quite different from _______ of the past.

A．to be built, ones

B．being built, one

C．built, ones

D．built, those

判别原型化反复适合于系统的选择条件有多方面，其中有关事件处理或批处理类型的判别条件应属于下列哪个条件

A．逻辑结构

B．用户特征

C．系统结构

D．应用约束