违章按照性质分为管理违章、（）和装置违章。
A.行为违章
B.制度违章
C.安全违章
D.运行违章
参考答案：A
（）是画面构图的基础.
A.分辨力
B.色彩
C.线条
D.视觉心理
() people went to the concert which was held in People's Square () the night of May Day.
A. Thousands of; in
B. Thousand; on
C. Many thousand; in
D. Thousands of; on
