题目

Michael Jackson’s sudden death really astonished(震惊) his fans, but soon they are glad to find another younger “King of Pop” has appeared. Wang Yiming, who is known as Xiao Bao, has already been popular across the world with his wonderful dance moves. He once appeared on U.S. television show “Ellen” and performed successfully at the World Expo 2010.     About seven years ago, Xiao Bao was born prematurely（早产）, which made his mother really worried. He was so weak. What could he do? Doctors suggested that moving his body to music would help make him strong, but soon his钾长石是常见的含铝矿物，其主要成分是KAlSi3O8 ， KAlSi3O8中硅元素的化合价为（ ）A.+2B.+4C.﹣4D.+3