______time went on, the people in the area came to realize how serious the environment had been polluted.

A．As

B．With

C．When

D．While

下列费用偏差原因中，属于设计原因的有()。

A.图纸提供不及时

B.设计漏项

C.协调不佳

D.设计标准变化

E.自然因素