一战590 狗不多

傲骨

M:
1.有两条平行线 一面4个点 一面5个点 问能组成几个三角形 应该是70吧
2.已知圆半径4 和一个扇形面积2派 问扇形的角度 这个比较简单 是45度吧3.存钱问题 年复利是2% 两年后利息是5050 问一开始存多少钱4.有两个人 跑圆圈 外圈比内圈多15 问跑了10圈后 外圈的人比内圈的多跑多少 求近似 是950好像
逻辑暂时想不起来了
阅读有一篇介绍拉丁语的 由于自己做的也不好 就不误导大家了
还有一篇讲鸟类是怎么飞的 有两种假设 分别是上树以后飞翔和被捕食者追着跑然后再非 这篇我记得很清楚 GWD上的原题应该是 连最后4道问题都一样 麻烦考古的同学找下
希望能对这个月考的同学稍微有点帮助

Jasonhere

Although many lines of evidence indicate that birds evolved from ground-dwelling theropod dinosaurs, some scientists remain unconvinced. They argue that theropods appeared too late to have given rise to birds, noting that Archaeopteryx lithographica – the oldest known bird – appears in the fossil record about 150 million years ago, whereas the fossil remains of various nonavian maniraptor theropods – the closest known relatives of birds – date only to about 115 million years ago. But investigators have now uncovered bones that evidently belong to nonavian maniraptors dating to the time of Archaeopteryx. In any case, failure to find fossils of a predicted kind does not rule out their existence in an undiscovered deposit. Skeptics also argue that the fused clavicles (the “wishbone”) of birds differ from the unfused clavicles of theropods. This objection was reasonable when only early theropod clavicles had been discovered, but fossilized theropod clavicles that look just like the wishbone of Archaeopteryx have now been unearthed. Finally, some scientists argue that the complex lungs of birds could not have evolved from theropod lungs, an assertion that cannot be supported or falsified at the moment, because no fossil lungs are preserved in the paleontological record.



T-4-Q5
The primary purpose of the passage is to
A.    compare the development of two hypotheses concerning the evolutionary origin of birds
B.    suggest revisions to the standard theory of the evolutionary history of birds
C.    evaluate the usefulness of fossil evidence in determining the evolutionary history of birds
D.    challenge the theory that birds evolved from ground-dwelling theropod dinosaurs
E.    respond to criticisms of the theory that birds evolved from ground-dwelling theropod dinosaurs
T-4-Q6
In the context of the passage, the phrase “fossils of a predicted kind”(line 16) most likely refers to which of the following?
A.    Theropod fossils with fused clavicles
B.    Theropod fossils that are similar in structure to Archaeopteryx fossils
C.    Theropod fossils dating back more than 150 million years
D.    Fossils indicating the structure of theropod lungs
E.    Fossils indicating the structure of Archaeopteryx lungs
T-4-Q7
Which of the following is mentioned in the passage as an argument made by scientists who are unconvinced that birds evolved from theropod dinosaurs?
A.    There are no known theropod dinosaur fossils dating from a period after the time of Archaeopteryx.
B.    There are no known theropod dinosaur fossils that indicate the structure of those dinosaurs’ lungs.
C.    Theropod dinosaurs appear in the fossil record about 150 million years ago.
D.    Theropod dinosaurs did not have fused clavicles.
E.    Theropod dinosaurs had certain bones that look just like those of Archaeopteryx.


LZ是这篇吗

忽然忘了解脱

啊。。。。。。。GWD很久不做了，不熟，LZ看看是不是这篇

1. GWD-27-Q3-Q6 鸟为什么会飞的两种理论
Two opposing scenarios,

the “arboreal” hypothesis and

the “cursorial” hypothesis, have

Line traditionally been put forward con-

(5)  cerning the origins of bird flight.

The “arboreal” hypothesis holds

that bird ancestors began to fly

by climbing frees and gliding

down from branches with the

(10) help of incipient feathers: the

height of trees provides a good

starting place for launching flight,

especially through gliding. As

feathers became larger over time,

(15) flapping flight evolved and birds

finally became fully air-borne.

This hypothesis makes intuitive

Sense, but certain aspects are

Troubling. Archaeopteryx (the

(20) earliest known bird) and its

maniraptoran dinosaur cousins

have no obviously arboreal

adaptations, such as feet fully

adapted for perching. Perhaps

(25) some of them could climb trees,

but no convincing analysis has

demonstrated how Archaeopteryx

would have both climbed and

flown with its forelimbs, and there

(30) were no plants taller than a few

meters in the environments where

Archaeopteryx fossils have been

found. Even if the animals could

climb trees, this ability is not

(35) synonymous with gliding ability.

(Many small animals, and even

some goats and kangaroos,

are capable of climbing trees

but are not gliders.) Besides,

(40) Archaeopteryx shows no obvi-

ous features of gliders, such as

a broad membrane connecting

forelimbs and hind limbs.

The “cursorial”(running)

(45) hypothesis holds that small

dinosaurs ran along the ground

and stretched out their arms for

balance as they leaped into the

air after insect prey or, perhaps,

(50) to avoid predators. Even rudi-

mentary feathers on forelimbs

could have expanded the arm’s

surface area to enhance lift

slightly. Larger feathers could

(55) have increased lift incrementally,

until sustained flight was gradu-

ally achieved. Of course, a leap

into the air does not provide the

acceleration produced by drop-

(60) ping out of a tree; an animal

would have to run quite fast

to take off. Still, some small

terrestrial animals can achieve

high speeds. The cursorial

(65) hypothesis is strengthened by

the fact that the immediate the-

ropod dinosaur ancestors of

birds were terrestrial, and they

had the traits needed for high

(70) lift off speeds: they were small,

agile, lightly built, long-legged,

and good runners. And because

they were bipedal, their arms

were free to evolve flapping flight,

(75) which cannot be said for other

reptiles of their time.



---------------------------------------------------------

Q 3:

The primary purpose of the passage is to



A. present counterevidence to two hypotheses concerning the origins of  bird flight

B. propose and alternative to two hypotheses concerning the origins of bird flight

correct certain misconceptions about hypotheses concerning the  origins of bird flight

C. (missing)

D. refute a challenge to a hypothesis concerning the origins of bird flight

E. evaluate competing hypotheses concerning the origins of bird flight



---------------------------------------------------

Q 4:

The passage presents which of the following facts as evidence that tends to undermine the arboreal hypothesis?



A. Feathers tend to become larger over time

B. Flapping flight is thought to have evolved gradually over time

C. Many small animals are capable of climbing trees.

D. Plants in Archaeopteryx’s known habitats were relatively small

E. Leaping into the air does not provide as much acceleration as gliding out of a tree



------------------------------------------------

Q 5:

Which of the following is included in the discussion of the cursorial hypothesis but not in the discussion of the arboreal hypothesis?



A. A discussion of some of the features of Archaeopteryx

B. A description of the environment known to have been inhabited by bird ancestors

C. A possible reason why bird ancestors might have been engaging in activities that eventually evolved into flight

D. A description of the obvious features of animals with gliding ability

E. An estimate of the amount of time it took for bird ancestors to evolve the kind of flapping flight that allowed them to become completely airborne



-------------------------------------------------

Q 6:

The passage suggests which of the following regarding the climbing ability of Archaeopteryx?



A. Its ability to climb trees was likely hindered by the presence of incipient feathers on its forelimbs.

B. It was probably better at climbing trees than were its maniraptoran dinosaur cousins.

C. It had certain physical adaptations that suggest it was skilled at climbing trees.

D. Scientists have recently discovered fossil evidence suggesting it could not climb trees.

E. Scientists are uncertain whether it was capable of climbing trees


附上答案，刚才赶着去上课，太急了，这次给大家重新翻了下答案，希望准备考的同学能够碰上。

jiayini85

迅速的考古 感谢LS2位 也感谢LZ的狗狗
再战加油！

Jasonhere

呼唤LZ

傲骨

是的 就是这个

忽然忘了解脱

是的 就是这个

-- by 会员 傲骨 (2010/4/27 18:11:49)

哪个哪个？！~~~我LS的还是我的？

傲骨

是你的 哈哈

Jasonhere

多谢LZ！