题目

阅读理解 Why doyou think people who live in some hot countries eat very spicy (辛辣的) food? Is it because the spices make the food taste better? Is it justbecause their parents and grandparents and great-grandparents liked hot food, oris there some connection between spices and healthy food? Researchersfrom Cornell University think that it is because spice plants have some importantchemicals (化学物质). These chemicals can killbacteria (细菌) which spoil food. Mostcommon spices can kill 75 to 100 percent of the bacteria in food, explainsone of the scientists. The bacteria grow mo18．不等式（2x-3）（6-x）＜0的解集用区间表示为（-∞，$\frac{3}{2}$）∪（6，+∞）．