机械振动()可分为单自由度系统振动和多自由度系统振动。
A.按振动产生的原因分类
B.按振动的规律分类
C.按振动的位移特征分类
D.按振动系统的自由度多少来分类
参考答案:D
, I believe, and you will find the boy is very outgoing.
A.Having a talk with the student
B.One talk with the student
C.Given a talk with the student
D.If you have a talk with the student
某建筑工程设计方案投标文件作废,下列哪项不屑构成废标的理由(2003,69)
A.投标文件未经密封的
B.无相应资格的注册建筑师签字的
C.无单位法人签字的
D.未加盖投标人公章的