我是蜜桃桃
Sahara desert THE Sahara desert is the world’s largest desert area. It extends from the Africa’s Atlantic Ocean side to the Red sea and consists of the countries of Morocco, Algeria, Tunisia (突尼斯), Libya, Egypt, Mauritania (毛里塔尼亚), Mali, Niger(尼日尔), Chad(乍得), and Sudan. It is about 5,200 miles long. Overall, the Sahara desert covers 3,500,000 square miles.The geography of the desert is varied. In the west, the Sahara is rocky with varied elevation. It does contain underground rivers, which sometime penetrate the surface, resulting in oases. The central region of the Sahara has more elevation than the other areas, with peaks such as Tahat. Even though the area lacks rainfall, these peaks are snowcapped during the winter. The eastern part of the Sahara, the Libyan desert, is dry with very few oases.The Sahara’s climate is very hot and dry. Although it is very hot during the day, it does become cold at night. The Sahara used to be a fertile area in which elephants, giraffes and other animals grazed. It is estimated that in 4,000 BC, the climate began to get drier. The fertile landscape dried up and the desert widened, creating the form that appears today.(SD-Agencies)
doublel0814
2014年春季八年级下册人教版英语第七单元单词: Unit 7 (69个) square 平方, 正方形 meter米,公尺 deep深的,纵深的 desert沙漠 population 人口,人口数量 Asia 亚洲 feel free (可以)随便(做某事) tour 旅行, 旅游 tourist 旅行者, 观光者 wall墙 amazing 令人大为惊奇的, 令人惊喜(或惊叹)的 ancient 古代的, 古老的 protect 保护, 防护 wide 宽的, 宽阔的 as far as I know就我所知 achievement 成就,成绩 southwestern 西南的,西南方向的 thick 厚的, 浓的 include 包括, 包含 freezing 极冷的, 冰冻的 condition 条件, 状况 take in 吸入, 吞入(体内) succeed成功,实现目标 challenge 挑战 考验 in the face of 面对(问题,困难等) achieve 达到,完成,成功 force 力量 nature 自然界, 大自然 even though (=even if )即使, 虽然 ocean 海洋,大海, the Pacific 太平洋, cm (=centimeter ) 厘米 weigh 重量是…, 称…的重量 birth 出生, 诞生 at birth 出生时 up to 到达(某数量, 程度等) 至多有, 不多于 adult 成年的, 成人的,成人, 成年动物 bamboo 竹子 endangered 濒危的 research 研究, 调查 keeper 饲养员, 保管人 awake 醒着 excitement 激动, 兴奋 walk into 走路时撞着… fall over 绊倒 illness 病, 疾病 remaining 遗留的, 剩余的 or so 大约 artwork 图片, 插图 wild野生的 government 政府,内阁 whale 鲸 oil 油, 食用油,石油 protection 保护, 保卫 huge 巨大的, 极多的 Tenzing Norgay 丹增 .诺尔盖 Edmund Hillary 埃德蒙. 希拉里 Junko Tabei 田部井淳子 Qomolangma 珠穆朗玛峰 the Nile尼罗河 the Caspian Sea 里海 (世界最大的咸水湖) the Sahara 撒哈拉沙漠 the Yangtze 长江 the Yellow River 黄河 the Ming Dynasty 明朝 the Ming Great Wall 明长城 the Himalayas 喜马拉雅山脉 the Amazon River 亚马逊河 Chengdu Research Base 成都研究基地
silvia147852
撒哈拉沙漠是世界上最大的沙漠。相当于一个美国。 “撒哈拉”在阿拉伯语中是“大沙漠,大荒漠”的意思。 撒哈拉沙漠北起非洲北部的阿特拉斯山脉,南至苏丹草原带,宽1300~2100千米;西自大西洋边,东达红海沿岸,长4800千米,面积达900多万平方千米 撒哈拉沙漠约形成于二百五十万年前,是仅次于南极洲的世界第一大荒漠,是世界最大的沙质荒漠。它位于非洲北部,气候条件非常恶劣,是地球上最不适合生物生存的地方之一。其总面积约容得下整个美国本土
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