下面哪些是属于混凝土梁(拱)检查重点()
A、桥面防水层破损、开裂
B、泄水孔堵塞、漏水
C、遮挡端部挤死
D、梁体渗水、流白浆
参考答案:A, B, C, D
为了避免两端电流调节器同时工作引起调节不稳定,逆变侧电流调节器的定值比整流测一般小()p.u.
A.0.2
B.0.1
C.0.3
D.0.5
—We experienced a freezing cold winter this year.
—Oh, yes. I think ______ is the power of global warming that the climate goes from one extreme to
the other. [ ]
A. such
B. this
C. so
D. it