当燃气管道穿越()时,宜将燃气管道敷设在套管内。P194
A.铁路
B.河底
C.高速公路
D.电车轨道
E.城镇主干道
参考答案:A, C, D, E
Topics for textbooks and conference books should be_______ to the experiences and interests of the students.
A.relevant
B.concentrated
C.reliable
D.based
属于名誉的两大副作用的有()
①使人自我异化
②使人追求虚荣
③使人穷困潦倒
④妨碍人获得成功
A、①②
B、③④
C、②③
D、①④