题型:阅读理解 题类:常考题 难易度:普通
陕西省咸阳市2019-2020学年高二下学期英语期末教学质量检测卷
About 97% of the world's water is salty and is found in our oceans and seas. But, as we can't drink sea water, how can it be important?
Every part of our seas and oceans contains an amazing number of animals and fish that live at different ocean depths. Most of the different species of animals and fish depend on simple plants for their food. These simple plants called algae (海藻) drift near the surface of the ocean and use sunlight to turn carbon dioxide and water into food and oxygen. In fact, algae produce over half of the oxygen people breathe. How important sea water is!
Each plant or animal in our seas and oceans is an important link in a food chain. The algae are eaten in large amounts by microscopic animals, which are in tur consumed by larger animals. These food chains are delicately (微妙地) balanced.
The bad news about the food chains in the oceans is that they are under threat because of man. People once thought that the oceans were so big that it didn't matter if we dumped rubbish into them or caught huge quantities of fish and whales for food. But we now know this is not true and fish stocks in the oceans have started to drop.
Thankfully, the world is taking steps to protect the future of our oceans by introducing international agreements to protect marine habitats. Most counties have introduced fishing restrictions (限制) to protect fish stocks in the oceans and new techniques are being pioneered to cope with pollution. Finally, the importance of protecting oceans is being made known to more people. This is just the beginning of a long process to protect the oceans for our future. We depend on the oceans for fish which are an important part of the human diet. How important sea water is!
The weather symbol shown for each day in the five day forecast represents the main weather expected on the day in question. The maximum temperature is the highest temperature forecast between dawn and dusk, whereas the minimum temperature is the lowest temperature expected from dusk on the day to dawn the following day. The wind speed and direction are the expected conditions at midday.
London, United Kingdom 28,11, 2018 (Wed.) |
||||||
Day |
Summary |
Max day; Min night (℃) |
Wind (mph) |
Visibility |
Pressure |
Pollution |
Mon. Sunrise 08:06 Sunset 15:59 |
| 9-10 | very poor | 1030 | low | |
Tue. Sunrise 08:06 Sunset 16:00 |
| 3-8 | good | 1023 | low | |
Wed. Sunrise 08:06 Sunset 16:01 |
| -1-5 |
| good | 1023 | low |
Thur. Sunrise 08:06 Sunset 16:02 |
| 0-2 | good | 999 | low | |
Fri. Sunrise 08:06 Sunset 16:03 |
| 0-2 |
| good | 1012 | low |
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