3. 社会热点问题.pptx

7.Environmental experts point out that the increasing pollution not only causes serious problems such as global warming but also could threaten human life on our planet. 8.The overpopulation brings many problems, such as dealing with rubbish of the city, exploiting the ground water, and traffic jams. 9.All in all, we should make every effort to save everything useful to make contributions to our society.
4.In view of the seriousness of this problem, effective measures should be taken before things 经 get worse. 典 5.Many city residents complain that it is because there are so few buses in their city that they 句 have to spend much more time waiting for a bus. 式 6. There is no denying that air pollution is an extremely serious problem.
average 平均的；opposed 反对的，对立的；polluted 受污染的；steady 平稳的，持 续的，稳定的
副 steadily 平稳地，持续地，稳定地 词
重 点
and so on 等等；be opposed to 反对；come about 发生，产生；even if 即使；go up 上升，
Whatever colour changes the ocean experiences in the coming decades will probably be too gradual and unnoticeable, but they could mean significant changes. “It'll be a while before we can statistically show that the changes are happening because of climate chang,” Dutkiewicz said, “but the change in the colour of the ocean will be one of the early warning signals that we really have changed our planet.”
学无 止 境
Ⅰ.选出能替换画线部分的正确选项 1．Climate change will fuel the growth of phytoplankton in some areas, while reducing it in3．社会热点问题学无止 境名 词
核动 心词 单形 词容
词
circumstance 环境，情况；consumer 顾客；contribution 贡献，捐款，稿件；existence 生存，存在；growth 生长，增长；pollution 污染，污染物；quality 质量；quantity 量，数量；range 种类，范围；tendency 倾向，趋势 advocate 拥护，提倡，主张；consume 消费，消耗，耗尽，吃/喝；contribute 捐助， 撰稿，做贡献；exist 存在；glance 看一下，扫视，一瞥；grow 生长，增长；oppose 反对，反抗，与(某人)较量；pollute 弄脏，污染；tend 趋向，易于，照顾，护理
And why does that matter? Phytoplankton are the base of the food web. If certain kinds begin to disappear from the ocean, Dutkiewicz said, “it will change the type of fish that will be able to survive.” Those kinds of changes could affect the food chain.
Stephanie Dutkiewicz, a scientist in MIT's Center for Global Change Science, built a climate model that projects changes to the oceans throughout the century. In a world that warms up by 3℃, it found that multiple changes to the colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters, such as those of the Arctic, the warming will make conditions riper for phytoplankton, and these areas will turn greener. “Not only are the quantities of phytoplankton in the ocean changing,” she said, “but the type of phytoplankton is changing.”
Phytoplankton live at the ocean surface, where they pull carbon dioxide(二氧化碳) into the ocean while giving off oxygen. When these organisms die, they bury carbon in the deep ocean, an important process that helps to regulate the global climate. But phytoplankton are vulnerable to the ocean's warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunlight and carbon dioxide to grow, but also nutrients.
At the heart of the phenomenon lie tiny marine microorganisms(海洋微生物) called phytoplankton. Because of the way light reflects off the organisms, these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the
1. What are the first two paragraphs mainly about? A ．The various patterns at the ocean surface.
B. The cause of the changes in ocean colour. C. The way light reflects off marine organisms. D. The efforts to fuel the growth of phytoplankton. 2. What does the underlined word “vulnerable” in Paragraph 3 probably mean? A ．Sensitive. B．Beneficial. C．Significant. D．Unnoticeable.
3. What can we learn from the passage? A．Phytoplankton play a declining role in the marine ecosystem. B．Dutkiewicz's model aims to project phytoplankton changes. C ．Phytoplankton have been used to control global climate. D． Oceans with more phytoplankton may appear greener.
短 上涨，升起；keep on 继续；on behalf of… 作为……的代言人；on the whole 大体上，
语 基本上；put up with 忍受，容忍；quantities of 大量的；all in all 总之
1. He and his colleagues were opposed to the plan. 2.We cannot fail to notice that countless uncivilised behaviours exist in our daily lives, such as spitting and talking loudly. 3.As the pace of modern life continues to quicken, pressure seems to be on the increase all the time.