作者: reddragon 时间: 2003-2-28 16:48
1月8日 1、 how spiders populate remote areas(first question) 第一段：科学家近几十年才开始研究蜘蛛与环境的相互关系，因此现在科学家有关于蜘蛛的丰富资料。蜘蛛分布世界各地，特别是有蔬菜跟？东西的地方。就是barren(有考题，同义词：empty)的沙漠、山顶也有蜘蛛。 第二段：主要讲蜘蛛的飞行。年轻的蜘蛛会面向风，摆一个？姿势，然后分泌丝。一股小小的气流就会把蜘蛛带着飞起来。（这是第一种蜘蛛populate to other place 的方法） 第三段：提出问题，那些远离大陆的岛上的蜘蛛从何而来。另有例子，非洲两个相距400公里的岛的蜘蛛完全不同， 说明蜘蛛不会随风长距离飞行。因此，那些远离大陆的岛上的蜘蛛可能是因为以前大陆相连或因为随漂流的木头而到岛上的。
2、 Body language a. personal space : I, Intimate distance(distance of love, passion, protect etc.) II, Personal distance(distance of friends) III,xxxxxxx distance( I can''''t remember it exactly,maybe formal or business, it''s kind of distance of formall business conversation) IV, Public distance (it''s distance of public person like president) In North American, Northwest Europe, people tend to keep more distance than people in East Europe and South America.(Question) 另男人间保持更远距离。小孩间比成人或青年保持更近的距离。 b. other body language: like eye, american like to look at others to show their interest or when they want to dominant others. and american like to lean forward toward others to show their openness, and to show their willingness to listen to others.
3、 About what produces and influences the global weather (weather machine: sun light energy):地球有太阳的直接照射，太阳系有些星球没有。 太阳照射地球，使赤道比两极暖，空气轻，上升，冷却，水蒸气形成云後剩下的冷空气（有题，此冷空气dry）下降，随后降雨。 地球自转、轨道离太阳远近等诸多因素均影响气候 风的形成，赤道暖气流上升，形成真空，因此两极的气体流向赤道形成风。weather是太阳能量在地球的再分配。 （题：同义词：nature---character 易混选项origin）
4、 Foremost American settlers in Jamestown. They migrated from town of Europe, don''t know farming. Native Indian help them survive from starving. 叫他们种植，其中有土豆、？、？等三种东西。这些corn对他们非常有用，他们用它做food、drink、和牲畜的饲料。（有题：corn有多钟用途） 最早的时候北美耕地很少，因为有大片树林。只有印第安人有小块、小块的耕地。而小麦需要犁地很深，因此Europe settlers刚开始无法中小麦。（有题：因树林而无法中小麦）后来小麦种成了。对于别的作物他们要先做实验来确定能否适合本地种植（有题：most suited: most appropriated）。后来他们又从欧洲引进Olives,?,?,?,silk（有题：没有成功）等没有成功。后来又从欧洲引进马、羊、？、？（有题：北美原来没有）等，成功了。
The spectacular auroral light displays that appea in the earth's atmosphere around the north and south magnetic poles were once mysterious phenomena, Now, scientists have data from satellites and ground-based observations from which we know that the neuronal brilliance is an immense electrical discharge similar to that occurring in a neon sign.
To understand the cause of auroras, first picture the Earth enclosed by its magnetosphere, a huge region creatd by the Earth's magnetic field. Outside the magnetosphere, blasting toward the Earth is the solar wind, swiftly moving plasma of ionized gases with its own magnetic field,. Charged particles in this solar wind speed earthward along the solar wind's magnetic lines of force with a spiraling motion. The Earth's magnetosphere is a barrier to the solar wind, and forces the charged particles of the solar wind to flow around the magnetosphere itself. But in the Polar Regions, the magnetic lines of force of the Earth and of the solar wind bunch together. Here many of the solar wind's Charged particles break through the magnetosphere and enter the Earth's magnetic field. They then spiral back and forth between th Earth's magnetic poles very repidly. In the Polar Regions, electrons from the solar wind ionize an exite the atoms and molecules of the upper atmosphere, cusing them to emit auroral radiation of visible light.
The colors of an aurora depend on the atoms emitting them. The dominant greenishwhite light comes from low energy excitation of oxygen atoms. During huge magnetic storms oxygen atoms also undergo high-energy excitation and emit a crimson light. Excited nitrogen atoms contribute bands of color varying from blue to violet.
Viewed from outer space, auroras can be seen as dimly glowing belts wrapped around each of the Earth's magnetic poles. Each aurora hung like a curtain of light stretching over the Polar Regions and into the higher latitudes. When the solar flares that result in magnetic storms and auroral activity are very intense auroral displays may extend as far as the southern regions of the United States.
Studies of auroras have given physicists new information about the behavior of outer space and is being applied in attempts to harness energy from the fusion of atoms.
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