试题与答案

“赤潮”是一种海水污染现象,主要是水中的氮、磷等物质增多,使水体富营养化,浮游生

题型:填空题

题目:

“赤潮”是一种海水污染现象,主要是水中的氮、磷等物质增多,使水体富营养化,浮游生物大量繁殖,密度加大,使海水缺氧,造成其他海洋生物死亡,种类锐减,海水最终呈现出浮游生物本身的颜色,形成“赤潮”。“赤潮”的发生对沿海生态环境和海洋养殖业都会造成巨大的损失。“赤潮”现象自古就有,但随着工农业生产的迅速发展,发生的频率越来越高。我国自1933年首次报道“赤潮”以来,至1994年共有194次较大规模的赤潮发生,其中60年代以前只有4次,1990年后则有157次。

请你分析回答:  

(1)“赤潮”的发生与海水中氮、磷等物质的含量增多有直接关系,你认为这些氮、磷等物质是从哪里来的?____________。   

(2)“赤潮”的发生频率随工农业生产的发展而增高,这与工农业生产中的什么行为有直接关系?____________。   

(3)根据你所学的知识,为减少“赤潮”发生的频率,应该采取哪些措施?_____________。

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0803/3b7ff145a5ca2ae478779e923c44d6c6.html

下面是错误答案,用来干扰机器的。

参考答案:E

试题推荐
题型:阅读理解

The people below are looking for someplace to enjoy some entertainments in Beijing. After the description of these people, there is information about places A — F. Decide which place would be the most suitable for the person mentioned in1---5and write down the correct letter ( A — F ) on your answer sheet. One place is not suitable for all.

_____小题1:Stephen studies art in Beijing University. He shows great interest in paintings and he is especially interested in those oil paintings that reflect the variety of life.

____小题2: Mark has just come to China and he is very interested in Chinese culture. He has been waiting for a long time to have a chance to see a wonderful Chinese acrobatic (杂技的) performance in China.

____小题3: Oscar is a student from Yangzhou University, visiting his friends who share the same interest in music. They are planning to find someplace to enjoy rock and roll and pop songs.

___小题4: Charles works in Philips Company, Shanghai Branch. He is going to Beijing on business in middle September. He will be free in the evening, so he wants to go to someplace to enjoy some music performed by foreign bands.

____小题5: Carol studies Chinese in Beijing. She is free recently during the day time, so she would like to find someplace where she can attend some kind of activity so that she can learn some details about Chinese modern literature.

A.Capital Theatre: To celebrate its 50th anniversary, the China Acrobatic Troupe will present “The Soul of China”, where the seemingly impossible is made real. Chills (寒战) will run down your spine (脊柱) as you watch breathlessly as performers take their art and their bodies to the edge. Time: 7:30 p.m., September 13 — 19.

B.Huangshicheng Gallery: A group ink pain ting exhibition is running. About 50 works by 25 young artists including Ge Yun and Yu Yang are on display.

Time:9 a.m.— 5 p.m. until September 10.

C.The Wangfung Art Gallery: A joint show of oil paintings by 10 young and middle-aged artists will be hosted by the gallery. On display are more than 30 of their latest works, which capture the wonderous variety of life in unique styles.

Time: 9 :30 a.m. — 4:30 p.m., daily.

D.Anyuan Museum: The National Museum of Modern Chinese Literature offers an indepth study of the development of Chinese contemporary literature from 1919 to 1949.Time: 9 a.m. — 4 p.m., daily.

E. The Olympic Center: "The Fashionow Night of Chinese Rock" is set to bring back fans out by the thousands next month. Nine Chinese rock bands will perform at the concert, including older generation bands, middle generation bands, middle generation and some recent arrivals.

Time: September 16.

F. Grand Theater of the Cultural Palace of Nationalities: La Petite Band, the Baroque Orchestra of Belgium, will perform as part of activities across the world to commemorate (纪念) the 250th anniversary of Bach’s death. 

Time: 7:30 p.m. September 11 — 14.

查看答案
题型:选择题

下列各句语意明确的一项是[ ]

A.从鸟儿们的歌声中,看到了这场变迁的第一阵爆发。

B.在能看见和第一天下午,我将到森林里进行一次远足,我的眼睛陶醉在自然界的美丽之中。

C.回想自己最初写小说的动机,虽不似这位朋友的那般单纯,但如他一样的愿望我也有,所以,一经细想,发现这愿望也在全部动机中占了很大的比重。

D.当冬天抑制一切时,深埋着的春天的生机一片寂默,只等着旧秩序沉重的阻碍退去。

查看答案
微信公众账号搜索答案