局部通风机拐弯吊挂风筒质量标准是什么？

下列词语中没有错别字的一组是[ ]

A．蹂躏　深邃　急流勇退　各行其事

B．联袂　赝品　翻云复雨　集思广益

C．璀灿　蛰伏　明火执仗　出奇制胜

D．盘桓　羸弱　如法炮制　别出心裁

伸缩软管型装车机在装粮过程中可根据装粮情况自动调节软管的（）

A.直径

B.大小

C.高度

D.伸缩长度

____ we went those days when we were in the countryside, we were warmly welcomed.

A．There

B．Where

C．Wherever

D．Whatever

铁口连续过浅，极易引起跑大流或铁口区水箱烧坏，发展下去会导致炉缸烧穿。

Oily rags stored in a pile that is open to the atmosphere are a hazard because they may（）.

A.deteriorate and give off noxious gasses

B.spontaneously heat and catch fire

C.attract lice and other vermin and serve as a breeding ground

D.None of the above