关闭图标
log图标

toefl.viplgw.cn

  • 使用手机注册
  • 使用邮箱注册
  • 手机号不能为空!

    验证码不能为空!

    用户名不能为空!

    密码不能为空!

  • 邮箱不能为空!

    验证码不能为空!

    用户名不能为空!

    密码不能为空!

已有账号? 登录到雷哥托福
关闭图标
log图标
  • 使用手机找回密码
  • 使用邮箱找回密码
  • 手机号不能为空!

    验证码不能为空!

    密码不能为空!

  • 邮箱不能为空!

    验证码不能为空!

    密码不能为空!

又想起来了
加入生词本

listen

英['lɪs(ə)n] 美['lɪsn]
vi. 听,倾听;听从,听信
n. 听,倾听

已添加
×

我要举报草莓小菇凉评论

用户头像
草莓小菇凉:说的非常好,十分有道理,棒棒棒!

06-08 15:44:55

请选择举报类型:

举报电话:400 1816 180    举报QQ:2095453331
×
logo图标
分享到雷哥托福

分享成功图标分享成功

邀请名师点评成功,管理员正在安排老师进行点评。

继续做题 返回首页
支付雷豆失败图标 雷豆余额不足 购买雷豆 返回
报告题目错误
请选择错误类型:
请描述一下这个错误:

取消

文章结构

TPO 44-L3 .New Guinea 点击收藏

标准

  • 高音
  • 静音
  • 句子
    精听
  • 全文
    精听
  • 听写
    模式
  • 点击查看本句

    听写本句 再播一遍 下一句
  • 点击查看全文

    再播一遍本文

    Listen to part of a lecture in an anthropology class.

    So, we've been talking about early civilizations, how they developed, and early agriculture.

    And it's believed that agriculture arose independently in a few areas of the world about ten thousand years ago, and then spread from those areas to the rest of the world.

    Those cradles of agriculture include the Middle East, China and Southeast Asia, and parts of the Americas.

    Now, for many years archaeologists have speculated that agriculture also arose independently in another center, too-New Guinea, which is just north of Australia, in the South Pacific Ocean.

    You can see it on this map.

    So, it had been assumed for a long time that New Guinea,

    that domesticated plants and animals,

    the practice of agriculture, generally,

    had been introduced from Southeast Asia about 3500 years ago,

    had come south essentially.

    Then in the 1960s and 70s, research was conducted at sites in New Guinea to explore the possibility of independent agricultural development.

    But unfortunately, the evidence gathered at that time was inconclusive.

    For instance, although evidence was found of deforestation,

    you know, cutting down trees, from at least 7,000 years ago,

    that is long before we;d thought previously.

    It was unclear whether the forest had been cleared by farmers to plant fields,

    or by hunter-gatherers, so they could hunt more easily.

    And many plant remains like seeds and fruits don't preserve well in swampy soils, in humid environments like you often find in New Guinea.

    So really, the proof was limited.

    But, recent research has turned up some pretty convincing support.

    A group of archaeologists returned to a site that had been previously examined,

    Kuk Swamp, which is in a mountain valley in the highlands of what is now Papua, New Guinea.

    Based on their findings, they identified a succession of phases of agricultural development in the wetlands there,

    with several of these phases predating the earliest known agricultural influence from Southeast Asia.

    At the site in Kuk, they used an array of modern archaeological methods to analyze sediment samples from the soil.

    From the oldest soil layer dating back 10,000 years, they found evidence of pits, stake holes and ditches.

    Now, these all indicate that crops were being planted.

    Plants are tied to stakes, and ditches are for... for drainage,

    a proof of a very early, first phase of agricultural development.

    The second phase, which they identify from a higher layer of soil, featured regularly distributed mounds.

    Mounds were constructed to plant crops that can't tolerate very wet soil,

    such as bananas, because remember Kuk is a swampy wetland, and bananas wouldn't ordinarily grow well there.

    And in the layers from Kuk's third phase, they found evidence of an extensive network of ditches and drainage channels,

    indicating a further refinement of wetland cultivation.

    Because they had more advanced techniques than were available to earlier researchers,

    the archaeologists also were able to identify actual plant remains - micro-fossils in the soil from banana plants,

    and...and also grains of starch from taro, on the edges of stone tools that date from about 10,000 years ago.

    Finding the taro remains were very important,

    because it meant that it must have been planted there, brought from the lowlands,

    because taro doesn't grow naturally in the highlands.

    And as for the bananas, researchers also found a high percentage of fossils from banana plants in sediment samples dating from about 7,000 years ago,

    proof the bananas were deliberately planted,

    because where bananas grow naturally the concentration of the plant fossils is lower.

    Bananas don't naturally grow so densely.

    As a matter of fact, recent genetic research,

    genetic comparisons of banana species,

    suggests that the type of banana grown in New Guinea was domesticated there and then brought to Southeast Asia.

    So, not sure where I'm going with this?

    Well, usually, we expect to see that certain social changes are brought about by the development of agriculture,

    structural changes in the society like rapid population growth, different social classes.

    But New Guinea, it's largely unchanged.

    It's remained an egalitarian and rural society, so what does that tell us about the usual assumption?

    • special
    ☞查看答案 再播一遍

联系雷哥托福

全国免费咨询热线:400 1816 180

预约托福考试规划师