问题 解答题

如图是某草原生态系统中部分生物之间关系的示意图,据图回答:

(1)图中所含食物链有______条.

(2)如果该草原中喷洒了含有有机汞的农药,体内残留有机汞最多的生物是______.

答案

(1)、在生态系统内,各种生物之间由于食物关系而形成的一种联系,叫做食物链.在食物链中,生产者是最基础的环节,不体现非生物成分和分解者.其图中可以发现6条食物链:①草→鼠→猫头鹰②草→鼠→蛇→猫头鹰③草→食草昆虫→吃虫的鸟→猫头鹰④草→食草昆虫→蜘蛛→吃虫的鸟→猫头鹰⑤草→食草昆虫→蜘蛛→吃虫的鸟→猫头鹰⑥草→食草昆虫→青蛙→蛇→猫头鹰.

(2)、由于生物富集现象,一些有害物质通过食物链其浓度随消费者级别的升高而逐步增加,所以有害物质的浓度总是在最高级别的消费者体内积累最多.在此生态系统内猫头鹰是最高级消费者,故它体内有机汞浓度最多.

故答案为:(1)6    (2)猫头鹰

阅读理解与欣赏

现代文阅读。(9分)

梅雨潭闪闪的绿色招引着我们;我们开始追捉她那离合的神光了。揪着草,攀着乱石,小心探身下去,又鞠躬过了一个石穹门,便到了汪汪一碧的潭边了。瀑布在襟袖之间;但我的心中已没有瀑布了。我的心随潭水的绿而摇荡。那醉人的绿呀!仿佛一张极大的荷叶铺着,满是奇异的绿呀。我想张开两臂抱住她;但这是怎样一个妄想呀。——站在水边,望到那面,居然觉着有些远呢!这平铺着、厚积着的绿,着实可爱。她松松的皱缬着,像少妇拖着的裙幅;她轻轻的摆弄着,像跳动的初恋的处女的心;她滑滑的明亮着,像涂了“明油”一般,有鸡蛋清那样软,那样嫩;她又不杂些儿尘滓,宛然一块温润的碧玉,只清清的一色——但你却看不透她!我曾见过北京什刹海拂地的绿杨,脱不了鹅黄的底子,似乎太淡了。我又曾见过杭州虎跑寺近旁高峻而深密的“绿壁”,丛叠着无穷的碧草与绿叶的,那又似乎太浓了。其余呢,西湖的波太明了,秦淮河的也太暗了。可爱的,我将什么来比拟你呢?我怎么比拟得出呢?大约潭是很深的,故能蕴蓄着这样奇异的绿;仿佛蔚蓝的天融了一块在里面似的,这才这般的鲜润呀。——那醉人的绿呀!我若能裁你以为带,我将赠给那轻盈的舞女;她必能临风飘举了。我若能挹你以为眼,我将赠给那善歌的盲妹;她必明眸善睐了。我舍不得你;我怎舍得你呢?我用手拍着你,抚摩着你,如同一个十二三岁的小姑娘。我又掬你入口,便是吻着她了。我送你一个名字,我从此叫你“女儿绿”,好么?(选自《绿》)小题1:从选文看,作者对梅雨潭的绿总的感受是醉人、奇异、            。(1分)

小题2:分析下面划线词语的作用。(2分)

揪着草,攀着乱石,小心探身下去,又鞠躬过了一个石穹门,便到了汪汪一碧的潭边了。

小题3:选文用形象的比喻从不同的角度来描绘梅雨潭的绿,试仿照例句赏析文中的比喻句。(2 分)

例句:她松松的皱缬着,像少妇拖着的裙幅。

赏析:这里把皱缬的水波比喻成少妇拖着的裙幅,表现出梅雨潭绿的清亮的特点。

句子:她轻轻的摆弄着,像跳动的初恋的处女的心。

赏析:                                                                

小题4:作者把“梅雨潭的绿”同几处名胜的“绿”相比后,人称由“她”转换为“你”,这样做的好处是什么?(2分)

小题5:请将下面的语段与梅雨潭水相比较,看看它们在描写上有什么相同之处?(2分)

那水呢,不但不结冰,反倒在绿藻上冒着点热气。水藻真绿,把终年贮蓄的绿色全拿出来了。天儿越晴,水藻越绿,就凭这些绿的精神,水也不忍得冰上;况且那长枝的垂柳还要在水里照个影儿呢。

阅读理解

Joe is interested in getting exercise and competing on a team. He reads about the events at the local pool and finds the perfect activity. 

Swimming Programs

Summer Swim Team 

Join a Summer Swim Team and compete with other swimmers! The program is offered at eight different local pools for youths to 17 years old. The season runs June 21—August 21. Practices are daily (Monday through Friday) throughout the summer. The championship meet(冠军赛) is August 21. Cost: $50.00

Pools & Practice Times

Buckman  2-3 P.M.           Montavilla  8-9 A.M.

Creston  7-9 A.M.             Peninsula  4-7 P.M.

Dishman  8-9 A.M.            Pier    noon-1 P.M.

Grant  8-10 A.M.             Sellwood  7-9 A.M.

Junior Swim Instructor

Two weeks, 20 hours of instruction, two hours per day for children 11-14 years old. Pre-training for youths interested in becoming swim instructors($45 per child)

Two weeks, 30 hours of instruction, three hours per day for children 11-14 years old. Pre-training in lifeguarding, and customer service ($45 per child)

Junior Swim Instructor & Junior Lifeguard Training Dates

June 28-July 9     August 9-August 20

June 12-July 23    August 23-September 3

June 26-August 6

Special Offer

Anyone who takes part in both junior swim instructor and junior lifeguard programs at the same time need only spend $75 instead of $90 for 50 hours of training.

Register Online

You can now register online! Visit our website at http://www.example.com You can choose an area of town, a specific local center, a program, or search for classes which can meet the needs of students of different ages. Just visit our website, and you’re on your way!

小题1:If Joe joins the Summer Swim Team, he _____

A. needs to pay $45.00

B. begins training at 6 A.M.

C. has to practice for two months

D. needs to practice for 7 days a week

小题2:Anyone who wants to be a junior swim instructor should _____

A.be 11-14 years old

B.pay the instructor by the hour

C.do at least 30 hours of training

D.be an experienced junior lifeguard小题3:What’s the main purpose of this text?

A.To introduce Joe’ s hobbies.

B.To introduce a new website.

C.To introduce several swimming pools

D.To introduce some swimming activities.