英语4级听力airpollution

㈠ 英语4级听力的难度如何比高考的听力要难多少

复难度比高考的难很多，语制速快很多，而且题目不给题干，得自己听。除了听写句子和单词，其他内容包括：短对话
、长对话、和短文章，都是只读一遍的。
四级听力题型及分值：1小对话：
8%
选择题共8道对话，每题长约1分钟
2长对话：
7%
选择题共2段对话，每段长约3分钟
3听力短文：
10%
选择题共3篇文章，每篇长约3分钟
4复合式听写：10%
听写填空填8个单词和三句话，放音三遍，共计8分钟
听力位于考试的卷二部分，共占全卷35%。

㈡ 求空气污染的英语四级作文 air pollution 120个字左右

1.

Air pollution is one of the major problems of the modern world. A great deal of energy is needed to run the factories of modern instrial nations. Automobile, trains, planes and busses need energy, too. Nearly all of this energy is proced by burning fuels. The burning proces wastes, some of which remain in the air, causing air pollution.
Scientists are finding ways to stop air pollution especially in big instrial areas and densely-populated cities. They are studying new ways of generating electricity that may be less damaging to the environment. In the meantime, many power plants are being modernized to give off less polluted material. Also, engineers try to design and locate new power plants to do minimum damage to the environment.
However, it may be that we still have a long way to go before we have a "clean" world. Nearly all of the countries are trying hard to prevent and control air pollution. There indeed seems to be no end to tasks that environmentalists will be required to do. People will continually find new ways to control pollution.

2.

The impact of air pollution on climate

Air pollution is now discussing how they affect climate. The most serious air pollution is generated by burning: the burning of sulfur in coal and oil, will proce sparse oxides; air to participate in high-temperature reaction, will proce nitrogen oxides; will proce incomplete combustion of hydrocarbons and carbon monoxide; while combustion of pyrolysis gasoline, but also release lead; ... .... However, even the cleanest fuel combustion will proce carbon dioxide. Of course, the animal's breathing process, the same release carbon dioxide, and that of carbon dioxide into the atmosphere, about 80% came from breathing, only 20% from fuel combustion. However, the burning destroyed the natural balance of carbon dioxide, so that the concentration of atmospheric carbon dioxide increased year by year, which may cause the "greenhouse effect", so that the earth's rising temperatures.
Turbidity current growth rate of the Earth, or even greater than the concentration of combustion caused by cO2 growth rate, therefore, atmospheric turbidity will influence the Earth's climate can not be ignored. The increase in turbidity over the world there are many reasons, such as fuel consumption increase, fuel increase in agricultural machinery, mechanized farming, and so an increase in Young earth.

In addition to the greenhouse effect and atmospheric turbidity may affect the Earth's climate, other factors such as sunspot activity, etc., to some extent also affect the Earth's climate. Sunspot activity since 1900 are constantly increasing. As the sunspot can increase the amount of solar radiation and thus cause rising temperatures.

The air pollution on the Earth's climate, they are not scientifically conclusive evidence on the. Most of was a bold extrapolation.

㈢ 如何练英语4级听力，有什么好方法推荐吗

首先查看“学习通”有专门的英语真题，对于某个地方听不懂，应反复听多几次。如果还是不懂，这时候我们就要看看原文了。这样来加深印象遇到不懂的单词，一定要及时查她的意思，不能拖。然后读五遍熟记他。最后，听力这种东西是很讲感觉的，平时有事没事，一定要多练。不能有三天打鱼两天晒网，不然只是一直在做无用功，浪费时间。（一）新闻听力
这道题大家应该不陌生吧，我想说的是，找关键词就对了！正式听之前，利用前面读Directions的时间，快速浏览1遍各个选项，这样听的时候就有重点了。
那么四级英语听力怎么练？对于新闻类的听力，一招制敌，那就是找关键词！大家可以看看下面这5点：
①首尾原则：重点听首尾处，一般都是考点；
②时间变更处：时态或者不同时间段发生的变化。
③数字处：与年代、金钱、比例、人口等数字有关的信息，重点听。
④专有名词处：重点听新的概念、组织、机构
关于听力材料的选择，建议以真题为主，VOA或者BBC听力材料为辅，真题，里面听力部分有一些解题新思路，还挺实用的，阅读也是一词一句挨着分析的，很适合英语基础弱的人用。（二）练真题听力的具体方法
●第1遍：先完整地做1遍题，把答案选出来。3
●第2遍：然后再细听，每听一句按暂停，听懂则看原文确认巩固，没听懂也看原文把不会的部分画出努力记住。第二遍做完后从头翻阅努力记住所有不会的点。
●第3遍：看前面题跟着听力争取努力每句听懂，画出关键词，抓住主要内容，细节信息。
听完3遍，最起码要能听懂大体意思，知道关键词句在哪出现。一开始如果听不懂，就先看听力原文，先把单词弄懂，再对着音频多听几遍。等你差不多熟悉语感后，你再听四级听力，就会觉得比较简单。

㈣ 考英语4级听力耳机接收信号不好怎么办

原因及处理方法如下：
1.无线网络距离较远，会导致接收信号不好便会一卡一内卡的。
2.电池电量不容足或电池质量过差导致电压不足，将耳机充电或换块电池便好。
3.蓝牙耳机就是将蓝牙技术应用在免持耳机上，让使用者可以免除恼人电线的牵绊，自在地以各种方式轻松通话。

㈤ 历年英语4级听力怎么下载

去书店买历年四级的全真试题，有送MP3光盘让你做听力的，而且有些还会附上作文跟高频词汇的MP3。或者你也可以去网上做历年的真题，都能搜到但要花些功夫，建议多做做题目熟悉答题顺序

㈥ 公共英语等级考试4级（PETS 4)听力录音

抄这位朋友，这是高等教育出版社的PETS4级教程听力，里面有PETS4级教材中每单元课文和阅读的音频材料，可以用作PETS4级听力练习，需要的话直接下载就行了。

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