小站备考
托福
托福听力
Official7听力真题

OFFICIAL7 Why does the professor say this.

展开
Tip:单击查看句义;划选/双击查生词

[00:00.00]Narrator: Listen to part of a lecture in an anthropology class.
[00:04.80]FEMALE PROFESSOR: So we've been discussing sixteenth century Native American life, and today we're going to focus on Iroquois and Huron peoples, [00:14.89]um they lived in the northeastern Great Lakes region of North America. [00:20.84]Now, uh back then, eh their lives depended on the natural resources of the forest, especially the birch tree. [00:31.03]The birch tree can grow in many different types of soils and i-is prevalent in that area. [00:38.19]Now, um eh can anyone here describe a birch tree?
[00:42.06]MALE STUDENT: Umm, they're tall? And…white? The bark, I mean.
[00:48.20]FEMALE PROFESSOR: Yes, [00:48.77]the birch tree has white bark. And this tough protective outer layer of the tree, this, this white bark, is waterproof, [00:58.20]and this waterproof quality of the bark oh it made it useful for making things like cooking containers, um …a-a variety of utensils. [01:09.02]And…i-if you peel birch bark in the winter––eh we call it the “winter bark” ––um, another layer, a tougher inner layer of the tree adheres to the bark, producing a stronger material…[01:22.81]so the “winter bark” was used for larger utensils and containers.
[01:27.14]MALE STUDENT: Umm, I know people make utensils out of wood, but…utensils out of tree bark?
[01:33.28]FEMALE PROFESSOR: Well, birch bark is pliable and very easy to bend. [01:38.12]The Native Americans would cut the bark and fold it into any shape they needed, then secure it with cords until it dried. [01:48.20]They could fold the bark into many shapes.
[01:50.65]FEMALE STUDENT: So, if they cooked in bowls made of birch bark, wouldn’t that make the food taste funny?
[01:57.34]FEMALE PROFESSOR: Oh, that’s one of the great things about birch bark. [02:00.90]The taste of the birch tree doesn’t get transferred to the food—[02:04.60]so it was perfect for cooking containers.[02:08.00]Eh but the most important use of the bark by far was the canoe. [02:14.11]Since the northeast region of North America is uh it’s interconnected by many streams and waterways, water transportation by vessels like a canoe was most essential.
[02:27.49]The paths through the woods were often overgrown, so, so water travel was much faster. [02:33.23]And here's what the Native Americans did…[02:36.34]they would peel large sheets of bark from the tree to form lightweight yet sturdy canoes. [02:43.24]The bark was stretched over frames made from tree branches, uh stitched together and sealed with resin— [02:51.91]y-you know that, that sticky liquid that comes out of the tree—[02:55.78]and when it dries, it's watertight.
[02:59.07]One great thing about these birch bark canoes was, uh they could carry a large amount of cargo. [03:05.55]F-For example, a canoe weighing about 50 pounds could carry up to 9 people and 250 pounds of cargo.
[03:14.87]FEMALE STUDENT: Wow! But…how far could they travel that way?
[03:18.43]FEMALE PROFESSOR: Well, like I said, the northeastern region is uh interconnected by rivers and streams, and uh the ocean at the coast. [03:26.89]The canoes allowed them to travel over a vast area that-that today would take a few hours to fly over. [03:34.62]You see, the Native Americans made canoes of all types, for travel on small streams or on large open ocean waters.
[03:44.70]For small streams they made narrow, maneuverable boats, while, while larger canoes were needed for the ocean. [03:52.44]They could travel throughout the area, only occasionally having to portage, um to, to, carry the canoe over land a short distance eh to another nearby stream. [04:04.19]And since the canoes were so light…this wasn’t a difficult task.[04:08.32]Now, how do you think this affected their lives?
[04:12.76]FEMALE STUDENT: Well, if they could travel so easily over such a large area, they could trade with people from other areas…which I guess, would…lead them to form alliances?
[04:25.25]FEMALE PROFESSOR: Exactly. [04:26.76]Having an efficient means of transportation, well that helped the Iroquois to form a federation, linked by natural waterways, [04:35.28]and this federation expanded from uh what is now southern Canada all the way south to the Delaware River. [04:43.01]And eh this efficiency of the birch bark canoes also made an impression on newcomers to the area. [04:50.74]French traders in the seventeenth century modeled their … eh well they adopted the design of the Iroquois birch bark canoes and they found that they could travel great distances—more than 1500 kilometers a month.
[05:05.48]Now, besides the bark, Native Americans also used the wood of the birch tree. [05:11.59]Eh, the young trees were used as supports for lodgings, with the waterproof bark used as roofing. [05:19.74]Um, branches were folded into snowshoes, [05:23.76]and the Native American people were all adept at running running very fast over the snow in these uh these birch branch snowshoes, which, if you’ve ever tried walking in snowshoes, you know isn’t easy.

6.Why does the professor say this.

你的答案:
正确答案:B
题目解析:
 后才能查看题目解析,还没有账号? 马上注册
教授说舟能行驶的范围是现在的飞机飞行几个小时才能到达的范围,意在形象地说明 舟的行驶范围非常之广,所以应选 B。

学习页面

Medi

terr

anean

加强 + 政府 + 名词后缀

加强的政府——管理

原文例句

加入生词

本文生词 0

色块区域是你收藏过的生词;

查询次数越多,颜色越深哦~

显示文中生词

登录后才能收藏生词哦,现在登录注册>

本文重点词 45

文中加粗单词为本文重点词;

根据词频与核心词范围精心挑选,托福考试必掌握词汇。

显示文中重点词
学习本文词汇

文中划选/双击的生词、加粗重点词已收纳至词盒

可随时点击词盒查看哦~

只有在词句精学模式下才能开启词盒功能哦~

我知道了

词盒
收藏
笔记
我的笔记
5000
保存
反馈