问题 问答题 简答题

真菌包括哪些微生物?他们在废水生物处理中各起什么作用?

答案

参考答案:

真菌属低等植物,种类繁多,形态、大小各异,包括酵母菌、霉菌及各种伞菌。酵母菌处理和有机固体废弃物生物处理中都起积极作用。酵母菌还可用作检测重金属,霉菌对废水中氰化物的去除率达90%以上。有的霉菌还可处理含硝基化合物废水。伞菌:既处理废水和固体废弃物,还可获得食用菌。

选择题
完形填空

第二节:完形填空(共20小题;每小题1分,满分30分)

阅读下列短文,掌握其大意,然后从36-55题各题所给的四个选项(A、B、C和D中),选出最佳选项。

During a recent vacation(假期) I visited Dusseldorf, a city in the former West Germany. The nine-day trip left a deep impression on me. I arrived at Dusseldorf airport at six. It was already dark outside. The first thing I needed to do was to find a place to___36___. I decided to telephone the youth hotel. But to use the ___37___ I needed some coins. I asked a lady for ___38___. To my surprise, she ___39___ me three coins to use. But all the phones in the___40___ needed phone cards. And phone cards could only be ___41___ at post-office during the daytime. I was afraid I ___42___ be able to call the hotel. An old gentleman helped me. He couldn’t speak English but___43___ that I needed to make a phone call. He showed me where the ___44___ was and inserted (插入) his phone card. I called the youth hotel and found a place to stay that night. The kindness of___45___ made me feel that I was not far from ___46___. And my first day in Germany wasn’t as___47___ as I expected.

Whenever I went, I asked people for ___48___. It surprised me that almost every young German could speak English ___49___. Older Germans ___50___ speak English very well, but they would try to help me whenever they could. One middle-aged man I___51___ directions even drove me to the place I was looking for. My experience in Germany completely changed my ___52___ of Germans. Before, I thought they were unfriendly to foreigners. In many World War Ⅱ films Germans are ___53___. But things changed ___54___. And the people couldn’t be  ___55___

friendly.

36.A. live            B. stay           C. work             D. visit

37.A. hotel           B. taxi           C. phone                  D. money

38.A. help            B. advice        C. the telephone      D. the youth hotel

39.A. lent            B. shared        C. borrowed          D. gave

40.A. station          B. airport        C. hotel                D. Germany

41.A. bought         B. found         C. used                 D. called

42.A. couldn’t        B. should         C. wouldn’t         D. will

43.A. mistook        B. heard          C. wondered         D. understood

44.A. phone          B. hotel          C. card                D. post - office

45.A. lady           B. old man        C. help                 D. the German people

46.A. Germany       B. home         C. the hotel          D. them

47.A. unforgetable     B. interesting     C. bad                D. good

48.A. directions       B. advice         C. English           D. way

49.A. often           B. fluently        C. a little           D. much

50.A. could also       B. couldn’t       C. can                  D. did

51.A. didn’t          B. lost           C. asked for          D. showed

52.A. love            B. life          C. impression        D. interest

53.A. friendly         B. enemy        C. bad manners       D. unfriendly

54.A. by then         B. since then      C. later                 D. before

55.A. still            B. much          C. too                       D. more