维护处理和大型处理的目的是有利于加重，有利于洗井除气。
参考答案：对
__________ of all was that not a sound could be heard.
A．It frightened us most
B．The thing that most frightened us
C．We were most frightened by
D．What frightened us most
锈赤扁谷盗主要危害（）。
A、完整的禾谷类
B、破损的禾谷类
C、面粉
D、完整的稻谷
