活性污泥从外观上呈黄褐色的絮绒颗粒状，其具有较大的比表面积和较高的含水率。
题型：判断题
问题：
活性污泥从外观上呈黄褐色的絮绒颗粒状，其具有较大的比表面积和较高的含水率。
题型：判断题
| 完形填空 | ||||
My brother, Mark, died in a traffic  accident four years ago.He was my big brother and__1__looked after me.I am__2__today for all of the special times we had as running partners, and times__3__driving to different races, where we had so many__4__about life in general.I__5__these talks terribly at this time of the year. __6__, I am so happy he shared with me the__7__of his faith.He was always so__8__to people, and I had been with him many times__9__we pulled over to help someone in need, __10__a smile and helping them get back on the road.So I was not__11__when he told me of the time when he was__12__ in college:It was the end of the month.To make matters worse, it was Friday and he had no__13__in his pocket for the weekend.Payday was Monday and he had no gas money to get home to__14__my dad and no money to buy food but he had faith that helping others__15__helping yourself. On his way home from classes that day, as he was driving along, he noticed a guy ahead of him __16__his lumber (木材) all over the road as he turned the corner.Mark__17__right over and helped him load the lumber back into his truck.The guy was so thankful and__18__his hand to Mark, and in it was one hundred dollars.Mark couldn't believe his__19__.He told him that was unnecessary but the man __20__and off he drove. I still think of Mark sitting there telling me that story, with tears in his eyes, and how faithful he was. | ||||
|