The old .engineer’s eyes still shone bright in the wrinkled brown face and his step as he came across the room was________，though slow.

A．shaky

B．heavy

C．casual

D．steady

在我国的规划体系中，（）是比较薄弱的环节。

A.区域规划

B.专项规划

C.省（自治区、直辖市）级规划

D.市县级规划