专业英语四级(听力)模拟试卷404 (题后含答案及解析)
题型有:1. DICTATION 2. LISTENING COMPREHENSION
PART I    DICTATIONDirections: Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be done at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be done at normal speed again and during this time you should check your work.
听力原文:The Media in the U.S.The media plays a vital role as a guardian of U.S. democracy. U.S. media have traveled a long road since the first newspaper was published in 1690. Within 50 years, magazines also began appearing in several major American cities. The advent of commercial radio at the beginning of the 20th century ended print四级听力s monopoly of the media in America. Television, an even more powerful medium, entered the scene shortly after World War II. Interactive media, fueled by the advance of digital technology and t
he growing convergence of the computer, telephone and cable television, represent the principal trend of the 21st century.
1.
正确答案:The Media in the U.S.The media plays a vital role as a guardian of U.S. democracy. U.S. media have traveled a long road since the first newspaper was published in 1690. Within 50 years, magazines also began appearing in several major American cities. The advent of commercial radio at the beginning of the 20th century ended prints monopoly of the media in America. Television, an even more powerful medium, entered the scene shortly after World War II. Interactive media, fueled by the advance of digital technology and the growing convergence of the computer, telephone and cable television, represent the principal trend of the 21st century.      涉及知识点:听力
PART II    LISTENING COMPREHENSION
SECTION A    TALKIn this section you will hear a talk. You will hear the talk ONCE ONLY.
While listening, you may look at ANSWER SHEET ONE and write NO MORE THAN THREE WORDS for each gap. Make sure the word (s) you fill in is (are) both grammatically and semantically acceptable. You may use the blank sheet for note-taking.You have THIRTY seconds to preview the gap-filling task.
听力原文:Global WarmingGood morning, everyone. Today well look at global warming, including its causes, effects and solutions. Then what is global warming? Global warming is a mix of rising temperatures on our planet, and irregular climate change.Global warming is happening because of several key factors, the first one is greenhouse gases like carbon dioxide, water vapor, and methane. These greenhouse gases trap heat and also light in the atmosphere, this causes the temperature to rise. The next important cause of global warming is deforestation. Humans use forests as fuel, for building, furniture, and other uses such as for paper. Forests remove carbon dioxide from the atmosphere and they store it, when we cut down trees we release a lot of the carbon that forests store. Another important cause of global warming that is sometimes overlooked is the use of chemical fertilizers on crops. Global warming is also caused by solar radiation in the form of light waves, that pass
through the earths atmosphere. Most of this radiation is observed by the earth and warms it.We have looked at the causes of global warming, now lets have a look at the effects of global warming on our planet. One of the effects of global warming is the destruction of many important physical and biological systems. There will be effects to land, water, and life. Another important effect that global warming will bring is the loss and endangerment of many species. Did you know that 30 percent of all plant and animal species alive in the world today are at risk of extinction by the year 2050 if average temperatures rise more than 2 to 11.5 degrees Fahrenheit. One very disappointing effect of global warming is war and conflicts. With a decline in the amounts of quality food, water, and land, it could bring an increase in global security threats, and war.There is a lot of evidence pointing to the fact that humans are causing global warming by creating greenhouse gases, so what can we do about it to slow down or stop global warming? It is clear that, on the one hand, we need to reduce the amounts of gases that we put into our atmosphere. One of the most important changes would be to be more energy efficient. We will need an increase in the use of wind and solar power, and natural gas. On the other hand, we can also increase the
amount of greenhouse gases that we take out of the atmosphere. We can take greenhouse gases out of the atmosphere by planting trees. We will also need to make changes to the way of farming. So if we work hard and concentrate our efforts we will succeed in coping with global warming and slow down or eventually stop the continuing warming of our planet.OK, thats the end of the talk today. Thank you.
Global Warming1. Global warming■ A mix of 【T1】______ and irregular climate change【T1】______2. Causes of global warming■ 【T2】______: carbon dioxide, water vapor, and methane          【T2】______■ 【T3】______: using forests as fuel, for building, furniture, etc.      【T3】______■ The use of 【T4】______ on crops      【T4】______■ 【T5】______    【T5】______3. Effects of global warming■ Destruction of important 【T6】______ systems  【T6】______■ Loss and endangerment of many 【T7】______  【T7】______■ 【T8】______    【T8】______4. Solutions to global warming■ To reduce gases put into atmosphere■ Be more 【T9】______, use wind and solar power, etc.        【T9】______■ To increase greenhouse gases taken out of the atmosphere■ Planting trees■ Making changes to the 【T10】______    【T10】______
 
2. 【T1】
正确答案:rising temperatures
解析:本题考查考生对细节的把握,要求补全对global warming(全球变暖)定义的解释。根据录音,全球变暖是指温度不断上升(rising temperatures)和不寻常的气候变化(irregular climate change)。故本题填入rising temperatures。 知识模块:听力
3. 【T2】
正确答案:greenhouse gases
解析:本题考查考生对分述点的把握,要求填入全球变暖的第一个原因。录音提到,全球变暖的第一个原因是温室气体(greenhouse gases),如二氧化碳(carbon dioxide),水蒸气(water vapor)和甲烷(methane)。故本题填入greenhouse gases。 知识模块:听力
4. 【T3】
正确答案:deforestation
解析:本题考查考生对分述点的把握,要求填入全球变暖的第二个原因。录音提到,全球变暖的第二个重要原因是森林砍伐(deforestation)。人类使用林木作为燃料,用于建筑,家具和其他用途,如纸张等。故本题填入deforestation。 知识模块:听力
5. 【T4】
正确答案:chemical fertilizers
解析:本题考查考生对分述点的把握,要求补充全球变暖第三个原因。根据题干内容,此原因与农作物(crops)相关。录音提到,导致全球变暖的另一个重要但有时被忽视的原因,是对农作物使用化肥(chemical fertilizers)。故本题填入chemical fertilizers。 知识模块:听力
6. 【T5】
正确答案:solar radiation
解析:本题考查考生对分述点的把握,要求填入全球变暖的最后一个原因。根据录音,全球
变暖由以光波形式穿过地球大气层的太阳辐射(solar radiation)l起的。故本题填入solar radiation。 知识模块:听力