CI（企业形象识别系统）战略的核心和灵魂是（）。
A.企业理念识别
B.企业行为识别
C.企业视觉识别
D.企业精神
参考答案：A
—What was Jimmy going to do?
—He was going to put ______ some signs ______ old books. [ ]
A. up; asking for
B. on; to ask to
C. up; asking to
D. down; asking to
固体废物按其化学成分可分为（）。
A.固体废物和半固体废物
B.生活废物和工业废物
C.有机废物和无机废物
D.高热值和低热值废物
