纵向地震下单层厂房的振动、变形特点有
A、质量、刚度分布均匀的等高厂房，以纵向平移振动为主
B、质心、刚心不重合的不等高厂房，将产生平移耦联扭转振动
C、屋盖还会产生纵、横平面内的弯、剪变形
D、纵向围护墙参与工作，空间作用显著

A.国务院
B.地方各级人民政府
C.县级人民政府
D.省级人民政府

A．conducts through 180° of the input waveform
B．conducts between 180° and 360° degrees of the input waveform, depending on the amount of dc bias
C．conducts through less than 180° of the input waveform
D．works only with digital and pulsed waveforms