全站仪和电子经纬仪的垂直观测精度通常为() ["2”","2’","2°","20°"]
在中国近代史上,规定外国列强有权在北京使馆区和北京至大沽、山海关一线“留兵驻守”的条约是() ["《天津条约》","《辛丑条约》","《北京条约》","《马关条约》"]
秩和检验的优点为() ["适用范围广","检验效率高","计算相对简便","适合计量资料","适合等级资料"]
在市、县城区内的施工现场,其连续密闭的围挡高度应至少为()米 ["2","2.5","3","3.5"]
东亚音乐最早受到()和印度文化的影响,后来一些国家受伊斯兰和欧洲文化的影响。 ["日本","中国","美国","韩国"]
塑性变形时应变张量和应变偏张量有何关系?其原因何在?