正常运行的活性污泥系统中，污泥本身是黄褐色或（）。

The rediscovery of this species of birds is one of the most___(ordinary)scientific findings in recent years.

At the end of the conference, all the_(participate) were asked to fill out a questiolmaire

Critics should be as objective as possible in their_ (analyze) of literary works

运输道路应平整坚实，推行速度能否超过人的行走速度？

配合挖土机作业时，能否进入铲斗回转范围？

产生感生电动势的非静电力是感生电场对电荷的作用力，产生动生电动势的非静电力是__洛伦兹____力.

使用中的氧气瓶和乙炔瓶应 ( ) 放置，并固定起来。氧气瓶和乙炔气瓶的距离不得小于( ) 米。

2010年国家图书馆出版社出版了第（）版《中国图书馆分类法》。

It will be interesting to see what’s going to happen at the next________(elect).