当采用装配式楼盖时，一般多层房屋钢筋混凝土框架柱的计算长度为( )。

• A.底层l<img src="https://timg.fentiku.com/97/2016/12/22/4MUnI6TRSe.png" title='4MUnI6TRSe.png' alt='4MUnI6TRSe.png'/>=1.0H，其他层l<img src="https://timg.fentiku.com/97/2016/12/22/4MUnI6TRSe.png" title='4MUnI6TRSe.png' alt='4MUnI6TRSe.png'/>=1.25H
• B.底层l<img src="https://timg.fentiku.com/97/2016/12/22/11FX2WqaKc.png" title='11FX2WqaKc.png' alt='11FX2WqaKc.png'/>=1.25H，其他层l<img src="https://timg.fentiku.com/97/2016/12/22/11FX2WqaKc.png" title='11FX2WqaKc.png' alt='11FX2WqaKc.png'/>=1.5H
• C.底层l<img src="https://timg.fentiku.com/97/2016/12/22/ZFWYMKVQRr.png" title='ZFWYMKVQRr.png' alt='ZFWYMKVQRr.png'/>=1.25H，其他层l<img src="https://timg.fentiku.com/97/2016/12/22/ZFWYMKVQRr.png" title='ZFWYMKVQRr.png' alt='ZFWYMKVQRr.png'/>=1.0H
• D.底层l<img src="https://timg.fentiku.com/97/2016/12/22/KK7wAdo0gT.png" title='KK7wAdo0gT.png' alt='KK7wAdo0gT.png'/>=1.5H，其他层l<img src="https://timg.fentiku.com/97/2016/12/22/KK7wAdo0gT.png" title='KK7wAdo0gT.png' alt='KK7wAdo0gT.png'/>=1.5H

正确答案：B