问题 实验题

分析下列有关鸟类的资料信息,回答问题:(10分)

项目生活环境体表体温呼吸心脏结构生殖
特征陆地,能在空中飞翔被羽毛,前肢变成翼高而

恒定

用肺呼吸,有气囊,能进行双重呼吸二心房二心室体内受精,卵生,

孵卵育雏

1、鸟类适于飞翔的主要形态结构特是:                      ;骨骼很轻等。

2、鸟类具有高而恒定的体温,保证了高而稳定的新陈代谢能力,增强了对环境的适应。与 这一功能相适应的主要结构特点是:体表              ; 体内具有与肺相连通的           ,能进行                  ;心脏有                   ,动脉血与静脉血完全分开,保证了动脉血中含有丰富的              

3、鸟类与爬行类在生殖上的相同点是                ;            ;与爬行类相比,鸟类具有更加完善的繁殖行为,例如:                             

答案

1、体表被羽毛;前肢变成翼

2、被覆羽毛;气囊;双重呼吸;四腔;氧气

3、体内受精;卵生;筑巢、求偶、交配、产卵、孵化、育雏

题目分析:1、多数鸟类营飞行生活,其结构特征总是与其生活相适应的.如鸟类大多体表被羽毛,前肢变成翼,适于飞行;身体呈流线型,可以减少飞行时的阻力等特征。

2.鸟类有许多地方适于其在空中飞行:鸟的骨胳中空,重量很轻;鸟没有牙齿,而且不储存粪便,可以减轻身体的重量;鸟的身体呈流线型,体表被有羽毛,这样可以减少空气阻力.前肢特化成翼,宽大的翼又增加了飞行的升力,所以,鸟类可以不用扇动翅膀就可以滑翔很远的距离;鸟类不仅有肺而且有气囊,双重呼吸提高呼吸的效率,可以提供充足的氧气,产生大量的热能适应飞行的需要.鸟类的胸肌特别发达,可以有力地带动翅膀扇动,提供强大的动力;鸟的食量特别大,可以保证飞行时能量的供应.鸟类的循环系统发达,供血充足,可以保证肌肉中氧气和能量的供应.鸟类的心脏有四个腔:左心房、左心室、右心房、右心室,保证了动脉血和静脉血能分开,使的动脉血中含有丰富的氧气。

3.鸟类和爬行类都是体内受精、卵生;鸟类还有一些繁殖行为,大大提高了后代的成活率:筑巢、求偶、交配、产卵、孵化、育雏。

单项选择题 A1型题
单项选择题

What’s your earliest childhood memory Can you remember learning to walk Or talk The first time you heard thunder or watched a television program Adults seldom (1) events much earlier than the year or so before entering school, (2) children younger than three or four (3) retain any specific, personal experiences.

A variety of explanations have been (4) by psychologists for this "childhood amnesia". One argues that the hippo-campus; the region of the brain which is (5) for forming memories, does not mature until about the age of two. But the most popular theory (6) that, since adults don’t think like children, they cannot (7) childhood memories. Adults think in words, and their life memories are like stories or (8) one event follows (9) as in a novel or film. But when they search through their mental (10) for early childhood memories to add to this verbal life story, they don’t find any that fit the (11) . It’s like trying to find a Chinese word in an English dictionary.

Now psychologist Annette Simms of the New York State University offers a new (12) for childhood amnesia. She argues that there simply aren’t any early childhood memories to (13) . According to Dr. Simms, children need to learn to use someone else’s spoken description of their personal (14) in order to turn their own short-term, quickly forgotten (15) of them into long-term memories. In other (16) , children have to talk about their experiences and hear others talk about (17) --Mother talking about the afternoon (18) looking for seashells at the beach or Dad asking them about their day at Ocean Park. Without this (19) reinforcement, says Dr. Simms, children cannot form (20) memories of their personal experiences.

Notes: childhood amnesia 儿童失忆症。

(4)()

A.refuted

B.defied

C.proposed

D.witnessed