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初中二年级
  
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小 发表于 2008-5-13 23:57 只看该作者
这两天。。。。。
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/ O. c5 M0 x" }% C1 @6 M小马过河TOEFL,IBT,托福,新托福,机经,小马过河,留学,美国,海外 L. A+ x* }# F2 c) j
听写3
2 n8 T- S1 |- @小马过河185口语20个 TOEFL,IBT,托福,新托福,机经,小马过河,留学,美国,海外/ D: |8 N: P4 r+ C, p# j9 t
词频200
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" V9 D7 t2 @1 O' q" Bwww.xiaomaguohe.net今天杀毒重装系统7小时!就当娱乐吧~~~ [小马过河-新托福专业备考社区]1 _* Y* ]0 O7 }5 a: G1 {
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You know it is kind of fashionable among students to study well and exhausted species. Especially in danger ones like gold eagles or spurtle(spotted owls). But I also think everyday birds are really part of our life and simply onerlooked. So, I like to spend some time on talking very common bird, black crows. It might surprise you to know are most challenger bird to observer and study, first of all, they are look like. Picking one several individual in a flock and finding one again later is almost impossible. People study on large animals can put some marks on it so they can tell them apart. You can track(trap)large animals like bear in a mobilized or a tranquilized gun, and it is easy to put tag on it, but try doing that you will probably kill it. Secondly, are high intelligence survivals they adapt easily to wildly situation. This adds difficult to study in them because they pick so many individual allies habits. So, you can never sure about conclusion you reach about of obverse them applies to the whole species or just those particular you watching. One general of that can not make reasonable degree of certainly is that in Last 40 years more and more are being found in living in large cities. They are attracted by people, numerous surmount garbage and living place can also easy to get to. They make the distance they must travel to haunt a large shorter.TOEFL,IBT,托福,新托福,机经,小马过河,留学,美国,海外! n) ?6 e' }+ f! H& t8 [5 B
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As we all know, doctor’s assignment was for each to find little scientific puzzle to research and solve. Mine was why do not spider get stuck in their own webs, that is a pretty question if you ask me. Some one even read a thesis on it I am sure, there are actually serveral answers depend on spiders, let us start with one common type spiders. These spiders usually stay in the middle of the web and do not put any glue-like materia there. But they do leave a thin strand of sticky material on the outer part of the web. This material made of compoud that draw water molecules out of the air, when it draw enough water it does what water normally does. If forms little drops, the result 小马过河-新托福专业备考社区* ?! L. o, ?3 x$ i4 w3 x9 y7 j. @6 j
is sticky little globs, little balls of glue-like material. When the spider steps into one of these little by accident as it sometimes does. It is as human being step on a piece of chewing gum, it is just inconvenient. But when a fly in spider’s web it is about fifty of enough to make it stick tightly to the web. What is more, because the sticky material is in block and
- Z$ B0 |# y5 \" r* o3 L, S; i+ w小马过河-新托福专业备考社区the spider use less of it. By doing this spider save the energy and that means catch fewer flies. It is not of commonly(economy) really.The spiders do what is easiest for spiders.
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TOEFL,IBT,托福,新托福,机经,小马过河,留学,美国,海外" _5 }# [! O7 \
(五)动物行为小马过河% x' I/ ]! [" t. ~6 p, X1 s+ P' D \
We have all heard proverb “beauty is only skin deep” meaning that the outward appearance is not a valuable way to judge person’s worth. But researchers studying why animals are attracted to each other had found it possible(opposite) maybe true for animals. For them, a beautiful face and body are reliable indicate(indicators) of underline quality. And experiment has show many species are looking for at least one classical characteristic beauty mainly similtry(symmetry). Now, according to this theory the more selective partner with pair usually the female seek the maximum possible balance between the left and right half of a potential mate’s body. For example, certain female birds first check, to see the left wing is same shape or length to the right wing to get clues health and strength. Now what other evidence do we have of these kind of behaviour? Well, in one experiment researchers had put colour band on the lengths of . Female perfer the male with same colour on both legs those have different colours on each legs. Another ecperiment envoles the male elks indicate the importance of symmetry in the antlers. Of course often indicate that male has lost a fight to another male, and she is therefore not strongest. 小马过河' D) {: o) @: X8 V
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明天开始 再这样我就一头撞。。。。 [小马过河-新托福专业备考社区]7 V! M' r) L$ n

独上高楼,望尽天涯路!
-------牛
今天比昨天好不就是希望吗?
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