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山东省枣庄市山亭区农民高振楼种出的“富硒苹果”,在北京市场上卖出了1公斤40元的好价钱。硒是人体必须的营养微量元素,能够预防和治疗心血管
Shantou District, Zaozhuang City, Shandong Province, farmers shake high-floor floor planted “Se-rich apple,” sold in Beijing, 1 kg 40 yuan a good price. Selenium is a necessary trace element of the human body to prevent and treat cardiovascular disease