某一健康的人一次失血为多少才能引发生命危险( )
A:1200~1500 mL
B:800~1000 mL
C:600~700 mL
D:400~500 mL
读下列四个岛屿图,回答各题。
— I can't agree more ______ there is a heavy rain or other bad weather.