百分數做主語謂語單數還是複數有幾種情況?

百分數做主語謂語單數還是複數有幾種情況?

百分數作主語時謂語動詞的形式
“分數或百分數+ of +名詞”構成短語作主語時,謂語形式是用單數還是複數取決於它們表示的意義.
More than 70 percent of the earth's surface is covered by water.
More than 70 percent of the students in our class are league members.