偏心支撑结构的设计主要有什么内容?
参考答案:
耗能梁段的强度设计
支撑斜杆的承载力设计
The hotel has all the modern ________, and guests all feel ________ when they live in.[ ]
A.conveniences; convenient
B.convenience; convenient
C.convenience; convenience
D.conveniences; conveniences
以下电视制式中,( )帧频率为25 帧/秒。① PAL ② SECAM ③ NTSC
A.①
B.③
C.② ③
D.① ②