navbg

托福听力该怎样突破呢

昆居客 / 学习方法 /

托福听力中经常出现的问题就是没听清,其实这个问题也许真的是因为走神,下面小编就和大家分享托福听力该怎样突破呢,希望能够帮助到大家,来欣赏一下吧。

托福听力该怎样突破呢

1.提高托福听力分数应该从哪些方面下手?

一是提高听力实力,也就是听写,跟读模仿以及单词

二是提高做题技巧,分析各种题型及解题办法

三是深度分析听力文章,掌握一般文章逻辑

四是查阅背景知识

基本上这几个方面能够做到的话,听力在半个月到一个月之内会有很大的提升。

2.很多学生都有这样一个问题:听懂了,笔记也记了很多,但是怎么还是做不对题?

如果做不对题那么一定是文章没听懂,很少会出现文章全部都听懂了,但是还会错题的情况。

听懂这个概念本身就太主观,我觉得自己听懂了,我觉得自己笔记记得很全面了,这些其实都不是真的听懂了。

3.那什么是真正听懂了呢?

听懂是要能够掌握好文章的大方向,主旨和逻辑。如果听完一篇文章无法明确指出文章主旨和逻辑,就不能算是听懂了一篇文章,自然做题的时候也会出现一些错误。

4.笔记又该如何记呢?

托福听力训练笔记重点记文章中提到的考点、信号词以及动名词。很多人记笔记话费大量的时间,但是听完文章5分钟再去看自己的笔记,有些词都不知道代表了什么意思,这样等于无用功,笔记要能起到辅助的作用。一定要利用一段时间锻炼出适合自己的一套笔记系统。

托福听力练习:鸽子血检测替代儿童血液检测

Pigeons. Ever since humans established permanent agricultural settlements,
we've lived side-by-side with the birds—or, as some people call them, rats with
wings. They walk on our sidewalks, roost on our buildings, and eat our
leftovers. But soon pigeons may help us identify risks to public health.

"What we're doing here in my lab is we're assessing how we can use
something that's been considered a pest that people actively try to exterminate:
the pigeon. How can we use it to better the environment for not only ourselves
but for pigeons and for other wildlife?"

U.C. Davis neurobiologist Rebecca Calisi. She looked at lead levels in
blood samples from more than 800 injured pigeons brought to a New York City
wildlife rehabilitation center. And she compared those to lead levels in blood
samples collected from children by the New York City Department of Health in
routine screening efforts. The results were published in the journal
Chemosphere.

"The neighborhoods where children have high rates of lead toxicity, that's
where we saw pigeons with high blood lead levels...so this is a proof of concept
kind of project."

Most pigeons will live out their lives within just two kilometers of the
place they hatched, so the birds may be able to help researchers develop a
detailed map of the risk of toxic lead exposure.

In people, especially kids, lead exposure can affect intelligence, brain
development, social skills and memory. Having demonstrated that pigeons can
pinpoint areas with high lead contamination, Calisi thinks that the birds can
help researchers zero in on other potential environmental hazards as well.

"The thing is, we don't know what to test for right now. We know to test
for lead, but what about certain pesticides? Or fire retardants are a big
problem these days. We're not sure what the problems are. So instead of drawing
a ton of blood from children and putting them through all these tests, why not
use an animal that shares our environment, the pigeon, and test for a whole
suite of different potential harmful pollutants?"

So rather than dismissing them as rats with wings, why not think of them
as...lab rats with wings?

鸽子。自从人类建立永久性农业定居点以来,鸽子就一直与我们生活在一起,甚至有一些人称鸽子是有翅膀的老鼠。鸽子走在人行道上,栖息在建筑楼顶,吃我们的剩饭剩菜。但是不久以后鸽子可能会帮助我们确定公共卫生风险。

“我们正在实验室里评估如何使用被人们认为是害虫且一直想要消灭的动物:鸽子。我们怎么用鸽子更好地保护环境,不仅对我们人类有利,同时也对鸽子和其他野生动物有利?”

丽贝卡·卡利斯是加州大学戴维斯分校的神经生物学家。她对纽约市野生动物康复中心800多只受伤鸽子血液样本中的铅含量进行了研究。并将这些同从纽约市卫生局常规检查中收集来的儿童血液样本中的铅含量进行了比较。结果发表在《Chemosphere》杂志上。

“社区儿童高铅毒性的地方,也就是我们看到鸽子高血铅水平的地方……这是项目所证实的概念。”

大多数鸽子生活在距离它们的出生地只有2公里的地方,所以这种鸟类也许可以帮助研究人员绘制详细的铅毒风险地图。

对人们来说,尤其是对孩子来说,铅暴露会影响智力、大脑发育、社会技能和记忆力。卡利斯已经证明鸽子可以确定高铅污染的地区,她认为鸟类也可以帮助研究人员发现其他潜在的环境危害。

“问题是,目前我们不知道要怎么检测。我们知道要检测铅,但特定的农药呢?也许现在阻燃剂也是一个大问题。但是我们不确定是什么问题。所以我们没有没有提取孩子的大量血液样本进行测试,而是用动物血液,也就是鸽子的血液来测试各种潜在有害污染物。”

因此,与其蔑视它们是长着翅膀的老鼠,为什么不把它们看作是有翅膀的实验鼠。

2020托福听力练习:车门遥控装置安全隐患

Today's cars have loads of computer smarts built in. Like the chips that
allow you, with the push of a button to unlock your car. And as new cars move
down the assembly line, automakers program those functions into the car.

"They produce one car and they program a cryptographic secret in it, in
order to secure it against thieves." Timo Kasper, a cryptographer and engineer
at the security and IT consulting company Kasper & Oswald. "Then comes the
next car on the production line and they put the same secrets into the second
car. And then comes the third car on the production line and they again put the
same secrets into this car. And they repeat this process for millions of cars in
the world. And now millions of cars in the world share the same cryptographic
secret. Of course, this secret is not so well protected anymore, because it's in
every of these million cars, and in every remote control. And this is of course
a typical example of how to not do it."

And yet, he says that's exactly how the Volkswagen Group did do it, for
many cars manufactured in the last 20 years. Kasper and his colleagues decoded
that shared cryptographic secret by studying the design and operation of chips
from VW Group cars and remotes. After hacking the hardware, they were easily
able to eavesdrop on and decrypt unlocking signals, clone the remote control and
unlock cars. They presented the details August 12th at the USENIX Security
Symposium, in Austin, Texas.

Kasper says VW is aware of the problem—and they're not alone. "This is not
a VW bug but this is a red line, as we Germans say, through all the automotive
industry." In fact, in the same study, they showed that another encryption
system used by many other brands, including Ford, Chevy, Nissan and Mitsubishi,
has a weak cryptographic algorithm—which, again, allowed the team to break into
more than a dozen cars.

Bottom line? It's easier to hack into cars than many drivers might have
imagined. So if you want to avoid eavesdropping, the researchers recommend
simply ditching remote controls and cryptography, and just go back to the good
old metal key.

现在的汽车配备了大量电脑智能系统。比如芯片,让你可以一按按钮就打开车门。新车从装配线下线时,汽车制作商就已经将这些功能编入汽车。

“汽车制造商每生产一辆汽车,就会在车内编写一个加密程序,目的是确保汽车可以防盗。”蒂莫·卡斯珀是卡斯珀和奥斯瓦尔德安全信息咨询公司的密码学家兼工程师。“然后在生产下一辆车时,他们会在这辆车上装上同样的密码系统。在生产第三辆车时,他们会再次装上同样的密码系统。他们在全球数百万辆车上重复这一过程。现在全世界有数百万辆汽车拥有同样的加密程序。当然,这个密码系统不再受到较好的保护,因为在这数百万辆车中,每辆车、每个遥控装置中都有这一密码系统。这当然是个应该避免的典型的例子。”

他表示,大众汽车就在对过去20年间生产的汽车上进行了上述操作。卡斯珀和同事们通过研究大众汽车和其遥控装置的芯片,解码了车辆共享的密码系统。在入侵硬件之后,他们很容易能够窃听和解密释放信号,克隆遥控装置解锁汽车。8月12日,他们在得克萨斯州奥斯汀举行的USENIX安全研讨会上公布了具体的信息。

卡斯珀表示。大众公司已经意识到了这个问题——意识到问题的不仅仅是大众公司。“这不是大众的漏洞,就如我们德国人描述的那样,这是整个汽车行业的红线。实际上,在同一个研究中,他们发现福特、雪弗兰、尼桑、三菱等其他品牌使用的加密算法也有纰漏,这使研究团队再一次成功解锁了10多辆汽车。

底线?入侵解锁汽车比许多司机想的更容易。如果你想避免被窃听的话,研究人员建议,只要不使用遥控和加密装置,重新使用传统的金属钥匙就可以了。

重点讲解:

1. in order to 为了;以便;目的在于;

例句:She stepped forward in order to see clearly.

她向前走了一步以便能看得更清楚。

2. eavesdrop on 偷听;窃听;

例句:German hacker claims to have cracked the encryption that protects most
cellphone calls, potentially paving the way for others to eavesdrop on
conversations.

一名德国黑客声称了保护大部分手机通话的加密编码,使窃听他人手机通话成为可能。

3. be aware of 注意到的;察觉到的;意识到的;

例句:John has been aware of having done something wrong.

约翰已意识到自己做错了事情。

4. break into 强行进入;闯入;

例句:They break into computers and break the phone system. Real hackers call
these people crackers and want nothing to do with them.

他们入侵电脑,破坏电话系统。真正的黑客叫这些人骇客,而且不想与他们扯上边。

5. hack into (尤指为获取机密信息)侵入,非法进入(他人的计算机系统);

例句:There is no doubt that it is a criminal offence to hack into others'
computers and get secret data .

毫无疑问,非法侵入他人电脑获取机密资料是刑事犯罪。


广而告之

猜您喜欢

创业者如何寻找创业方向

  人人都想实现自己的创业梦,但是要成功创业并不是那么容易的事情。许多人看见别人创业以后身家百万,就自己一头扎进创业大军之中,殊不知创业的路途上所遇到的艰难险阻远远超过自己的···

初中英语学习的六大方法

  学习英语的方法不论初中还是什么时候,基本上都是一样的方式。下面是学习啦小编收集整理的初中英语学习的六大方法以供同学们学习。   一、 读   1、 朗读:一般文章读2~3遍,带着···

销售经理服务工作总结与计划范文

  时间总是在忙忙碌碌中过去了,那么销售经理服务工作总结与工作计划该怎样写呢?下面就是小编给大家带来的销售经理服务工作总结与计划范文,希望大家喜欢!   销售经理服务工作总结与···

爱情的文章:爱情的幸福等待

  爱情感悟:把爱放在心中,即使是漫长的等待,也是一种幸福。请和学习啦小编一块儿看看这篇文章,感受人生路上的浓浓爱意,理解爱情的真谛。   大千世界。路,一样的路;人,不一样的···

选择对创业模式轻松起步

  创业从来都不是一件容易的事,特别是对于一些第一次创业的人来说,创业就是从零开始!那么创业如何轻松起步呢?今天小编给大家介绍一种轻松起步的创业模式——创业项目加盟!希···

教师代表发言稿范文五篇

  对于学生来说,教师的爱是一种神奇而又伟大的力量,是除了母爱之外,世界上又一伟大的爱。下面小编给大家带来的是教师代表发言稿范文五篇,欢迎大家阅读参考!   教师代表发言稿范文1···

写面对错误的优秀作文5篇

  人非圣贤,孰能无过。知错就改,善莫大焉。以下是小编为大家推荐写面对错误的经典作文,欢迎阅读!   面对错误的作文1   在人的一生中,谁又能不犯错误呢?面对错误,有的人承认了···

开甜品店流程是怎样

  创业开店不是一件小事情,开店也不是说说而已,想要真正的开办起来,也还是需要经过多重小事情的结合,那么,开甜品店流程是怎样呢?有哪些准备事项呢?下面学习啦小编整理的开甜品店流程···

歌颂劳动美的演讲稿范文五篇

  一部人类的发展史其实就是一部劳动史,是劳动,创造了历史,是劳动,改变了世界。以下是小编整理的歌颂劳动美的演讲稿范文五篇,仅供参考,希望能帮助到大家!   歌颂劳动美的演讲稿···