题目内容
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： Recently completed research reveals warmer oceans caused by global warming is making it more difficult for fish to breathe and survive.
Biologists have known for years declining fish stocks arc connected to global warming, but a new study of eelpouts—big-headed fish that resemble eels—is the first to go deeper and see how warmer seas are connected to how fishes take in oxygen.
Scientists studied the relationship between sea temperature and eelpouts counts in the Southern North Sea, combining data from the field with lab investigations of eelpout physiology.
The researchers not only found the oxygen levels in the waters of the North and Baltic Seas have dropped because of increasing temperatures over the past 50 years--a factor that reduces fish population— they also discovered eelpouts need more oxygen in warmer waters, a second factor that is reducing their numbers.
A key factor in the diminishing size offish stock is increased difficulty in absorbing oxygen via respiration and blood circulation caused by the warming waters.
Animals tolerate a limited range of environmental conditions. Anything out of their tolerance can cause damage. Fish in the North Sea have evolved to tolerate a wider range of temperatures than fish elsewhere because of the large seasonal fluctuations there.
Worldwide, warming waters can be expected to strain species that require lots of oxygen, forcing them to either relocate to cooler waters or face extinction.
(27)
查看答案
搜索结果不匹配？点我反馈
更多问题
涉及结构安全、使用功能和建筑外观以及环保的主要物资的进场报验范围和要求应由施工单位和建设单位预定。()
听力原文：W: Robert, Why didn't you have your biology class today？
M: Only twenty out of a class of fifty-six showed up. Since the professor had planned to give a new lesson, he decided to put off the class until everyone was present.
Q: Why didn't he have the biology class？
(15)
阅读下文，并回答以下问题：
任何语言都存在着歧义现象，汉语也不例外。比如在汉语中，“生意”一词就至少可做两种解释。一种是指“生机”、“生命的活力”，如雪中红梅、雨后春笋，都可以说是生意盎然的象征。另一种是指“买卖”，亦即“商业经营”，如沿街叫卖、炒股放债、长途贩运，也都叫做“生意”。这两种“生意”其“能指”相同，但“能指”下边蕴涵着的“所指”却迥然有异。
文人们历来看重的显然是前一种“生意”。明代学者张岱说，弹琴拨阮，唱曲演戏，描画写字，作文赋诗，凡诸百项，皆借此一口“生鲜之气”，得此生意者，自致清虚，失此生意者，终成渣秽。清代学者王夫之也认为，写作时含情能达，会景生心，体物得神，有了生意，便自有灵通之句。由此看来，要使生活之树常青，生命之藤常绿，就缺少不了这股勃然于体内飘然于体外的生意。
商人看重的则是后一种“生意”，即以物生物。做生意就像饲养母鸡一样，抛出的是麸糠，获得的是鸡蛋甚至金蛋。
对于人类现实存在着的社会生活而言，这两种“生意”，自然都是不可缺少的。但从目前的行情看，后一种“生意”正酿成热门，甚至连“文人下海”也似乎成了一种时髦。这就不免令人有些担心，因为随着“文学艺术商品化”的呼声越来越高，两种生意就可能渐渐地只剩下一种生意了。从字源学考证，“意”者，“心音”也。生意，生意，生到最后，如果只能生出一堆硬邦邦的金币和实打实的物质来，那么生意还能成其为生意吗？
文章第一段中的“能指”和“所指”分别指的意思是()。
听力原文： Advertisement can be thought of as "the means of making known in order to buy or sell goods or services". Advertisement aims to increase people's awareness and arouse interest. It tries to inform. and to persuade. The media are all used to spread the message, such as, the press, the cinema and commercial radio, television and so on. Other ways of increasing consumer interest are through exhibitions and trade fairs as well as direct mail advertisement.
There can be no doubt that the growth in advertisement is one of the most striking features of the western world in this century. Many businesses such as those handling frozen foods, liquor, tobacco and medicines have been built up largely by advertisement.
We might ask who pay for the cost of advertisement, the producer or the customer？ Since advertisement forms part of the cost of production, which has to be covered by the selling price, it is clear that it is the customer who pays for advertisement.
It is difficult to measure exactly the influence of advertisement on sales. When the market is growing, advertisement helps to increase demand. When the market is shrinking, advertisement may prevent a bigger fall in sales than would occur without its support. What is clear is that business would not pay large sums for advertisement if they were not convinced of its value to them.
(30)
微信支付 
支付宝支付