题目

阅读理解The fried foods, salty snacks and meat are major foods of the Western diet, which account for about 30 percent of heart attack risk across the world. Meanwhile, a diet rich in fruits and vegetables, the so called Prudent diet, can lower the risk of heart attack, according to a study.The research which looked at dietary habits in 52 countries, found people who ate a Western diet had a 35 percent greater risk of having a heart attack, compared to those who ate little or no fried foods and meat. Those who followed a Prudent diet had a 30 percent lower risk of heart attack, compared to（2012?沧州模拟）在探究植物光合作用，呼吸作用和蒸腾作用活动中，某同学设计以下探究方案，请你用所学知识进行分析．（1）如甲图，将植物罩上透明塑料袋，放在光下3-4小时，将塑料袋中气体通过①号试管收集后取出试管，将一支带火星的木条伸进①号试管内，结果木条复燃了，由此得出的结论是：①号试管内含较多的氧气氧气（气体）．（2）如甲图，若将透明塑料袋换成黑色的，其目的是为了防止植物进行光合光合作用．上述（1）（2）实验中，分别用透明和黑色两种塑料袋是为了设置对照实验对照实验，该实验的变量是光光．（3）在实验过程中，塑料袋内壁出现水珠，是叶片进行蒸腾蒸腾作用散失的水分凝聚而成，这些水分是通过茎的木质部木质部中的导管自下往上运输来的．（4）如乙图，将植物罩上塑料袋，放在暗处3-4小时．将塑料袋中气体通入2号试管，结果发现澄清石灰水变浑浊．由此得出结论是：植物进行了呼吸呼吸作用，释放出二氧化碳二氧化碳（气体）．