题型:阅读理解 题类:常考题 难易度:普通
河北省冀州市中学2017-2018学年高一下学期英语3月月考试卷
Most people would say the sea is blue and green. But the people who live near the coast of Zhejiang may say it is red. It is not people who caused the colour change, but very small living thing in the sea. They are algae(藻类)and protozoa(原生动物). They come in many different colours; red, yellow or brown. Red is the easiest of those to see so when this happens people call it a “red tide.”
Red tides only happen when conditions in the sea are right. In the past few years, factories and people have been putting more chemicals into the sea. These chemicals help algae and protozoa to grow very quickly. The temperature of the sea is also important. Red tides usually happen at 20 to 30 degrees Celsius. Red tides often happen in dry, warm areas where there is little wind. Living things grow easily in these places. Sometimes fishermen help red tides by mistake. They put small sea animals into the water for food to help fish grow.
Those living things do more than change the colour of the water-they also put poison and mucus(黏液)into the sea. This is had for fish. The poison is bad for their brains. And too much mucus in the sea fills up fish's gills(鳃) so they can't breathe. Lots of dead fish and other sea animals are now washed up on Chinese beaches.
Red tides can be bad for people too. We shouldn't eat fish from red-tide waters. The algae gets inside of fish and it smells bad. It can make your eyes water. If people eat fish with too much algae inside they could die.
Fishermen in Zhejiang are having a hard time right now. Because of the red tide, they are selling 30% less fresh seafood than usual.
In China red tides usually happen in May and June around places like Fujian Guangdong and Hong Kong.
Many other countries sometimes also have red tides. But it seems that we have few ways to stop red tides. They can last as long as 16 months.
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Rule |
Fee |
|
Overweight* |
Bags heavier than 10 kilos |
¥100 per kilo over limit |
Oversized** |
Bags larger than 110cmX60cmX30cm |
¥250 per bag |
Extra bags |
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