A:has an opera attracted
B:an opera has attracted
C:is an opera attracted
D:an opera is attracted
下列句子有错别字的一项是( )
下图表示从光裸的岩地上最终演替出森林的相关曲线,其中Ⅰ和Ⅱ曲线的描述全都正确的是( )