题目

The world’s most popular type of banana is facing a major health crisis. According to a new study, a disease caused by a powerful fongus(真菌）is killing the Cavendish banana, which accounts for 99% of the banana market around the globe. The disease, called Tropical Race 4(TR4),has affected banana crops in southeast Asia for decades. In recent years, it has spread to the Middle East and the African nation of Mozambique. Now experts fear the disease will show up in Latin America, where the majority of the world’s bananas are grown. Once a banana plant is infected with TR4, it can12．$-1\frac{2}{3}$的倒数是-$\frac{3}{5}$；$-1\frac{2}{3}$的绝对值是1$\frac{2}{3}$；若|-x|=8，则x=±8．