别人在场或与别人一起活动而造成行为效率提高的现象是( )
A．社会促进 B．社会干扰C．社会惰化 D．社会依从
参考答案：A
根据下面的课程表完成句子。
1. I have English and Chinese on _______________.
2. I have Chinese and music on _______________.
3. I can watch TV on _______________.
4. I have P. E. class on _______________.
5. I like _______________, because I like painting and art classes.
输气管线在土堤中的覆土厚度不得小于（）m。
A.0.5
B.0.6
C.1
D.1.2
