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问题 单项选择题

王芳的三门功课，平均成绩93分，如果不算数学成绩，两门课的平均成绩比三门课的平均成绩要低一分，由此可知，王芳的数学成绩是多少()

A．94
B．95
C．93
D．92

答案

参考答案：B

改错题

短文改错（共10小题，每小题1分，满分10分）

Not all people like to work and everyone likes to play. All over the world men and woman, boys and girls enjoy sports. Since long ago, many adults and children called their friends together to spend hours, even days play games. One of the reasons people like to play is that sports help them to live happy. In other words, they help to keep people strong and feel well. When people are playing games, they move a lot .That is how sports are good activities for their health. Having fun with their friends make them happy .Many people enjoy sports by watching others play. In American big cities, thousands sell tickets to watch football or basketball games.
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单项选择题

人的安全思想和意识是安全行为的基础，为此必须加强（）

A．以设备为中心的管理

B．以人为中心的管理

C．以安全教育为中心的管理

D．以环境为中心的管理
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