阅读理解
①It's hard to turn down a tasty banana. They taste good and you don't have to wash them before eating them. However, British scientists say that the fruit may disappear by 2050.
②One reason forthis is climate (气候) change. Scientists at the University of Exeter collected data (数据) from 27 countries and regions that produce 86 percent of the world's bananas. They found that climate change has improved growing conditions in 21 of these countries. In the past 60 years, the average yield (平均产量) has reached 1. 37 tons of bananas per hectare (公顷) .
③However, if temperatures keep rising, this advantage will disappear. Ten of the countries, including India, the world5s biggest producer of bananas, will produce fewer bananas. By 2050, the fruit may die out.
④Shouldn't bananas grow more easily if it*s hotter outside? In fact, the perfect temperature range for growing bananas is between 24 and 32 "C. If temperatures get too high, they will stop growing.
⑤Diseases are another danger to bananas. Unlike other crops, the bananas we grow come from shoot cuttings (茎段) rather than seeds (系中子) . This means that all banana plants have the same genotype. In other words, if a disease is able to kill one plant, it could kill them all.
⑥One serious disease is called Panama. Caused by fungus (真菌) in the soil, it spreads easily. It has spread across South Asia, Africa, the Middle East, and Australia. If one banana plantation suffers from the disease, it will take 30 years until it is able to grow bananas again. Scientists have yet to find a cure for this disease.
even though there is no beautiful scenery (风景)，and I wish that this day could bring me a understanding heart. 
One study in America found that students5 grades improved a little after the school introduced uniforms. But some students didn't want to wear the uniform. Other American studies showed that uniforms have nothing to do with the school performance. 