GRE填空题答题技巧及分析2020-11-25
Contrary to those who fear the impact of invasive species on native plants, the biologists contend that the threat posed to biodiversity by non-native species is often (i)_____. For instance, a study of garlic mustard, a non-native plant now thriving in Minnesota’s oak forests, found that garlic mustard abundance in forest plots was not (ii)_____ the number of other plant species there.
