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科教科普类
1、 Australia leads the world in its number of resident poisonous spiders as well as the strength
of their toxicity( 毒性 ). However,of almost 9,800 species most are perfectly harmless and马忠英
interesting.
Spider diversity is broad and many fascinating species occur here that range from the large to
the tiny and hardly noticed, and from the dullest black to the strangely shaped.
Spiders can be roughly classified according to the strategies( 策略 ) they u for feeding. Spiders which appeared earlier in the evolutionary scale feed by waiting in a cave for food to come along before grabbing it. Following them were spiders which actively wandered looking for
food and which caught it by chasing it down. The evolution of flying incts makes spiders evolve
new ways of catching food which couldn ’ t be chad and so the earliest air web weavers aro.
Most spiders feed on incts and other arthropods but the Whistling Spider feeds on frogs and
small birds. The Golden Orb Spider also feeds on small birds.
A spider periodically sheds( 蜕皮 ;零散 ) its skin so that it can grow. Immature stages are called
moults. Each species has a particular number of moults that it will go through before reaching its
老街歌词final adult stage.
Usually, once male spiders have mated, they die shortly after. But, even in death, Redback males often rve a purpo. The already pregnant Redback females always kill their lover and, in most cas, also eat them. This provides them with a small reproductive advantage.
Allowing spiders to take up places around hous can be beneficial in that they catch other annoying incts such as mosquitoes and flies.
Rest assured that while you might e some large spiders, and perhaps even some poisonous ones, a good rule is to look and admire but don't touch any spider you find. Even tho without poison could still have a nasty bite.
1.Different families of spiders are identified themlves by ______.
A.their physical character
黄瓜拌海蜇B.their ways of getting food
C.the strength of their toxicity
D.their effect on the environment
2.What are the latest spiders in their evolution process?
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简单点A.Spiders that cha down incts for food.
B.Spiders that wait for the incts to come along.
C.Spiders that can weave webs to catch flying incts.搞笑冷笑话
D.Spiders that actively go out to look for incts as food.
3.If a spider stays on the wall of your hou, you ______. ’ d better
A.kill it
B.feed it
C.let it be
D.cha it out
4.What is the passage mainly talking about?
A.A brief introduction of spiders.
B.The evolution process of spiders.
C.Living harmoniously with spiders.
刘元珍D.The living and feeing habits of spiders.
2、 Many people believe that you lo the ability to learn new languages as you get older.
Language experts,however,will tell you that you东北 ’ re neveratoonewoldlanguagetolear. As you
get older, it can be more difficult to learn a new language,though.
Children and adults learn new languages in different ways. For children, language is their life.
