A survivor from a ship wreck sees an image of a fish in the water.
问题描述：
A survivor from a ship wreck sees an image of a fish in the water.
to catch it with her spear,she must do what?
a.aim to the left of the fish
b.aim to the right of the fish
c.aim below the fish
d.aim above the fish
为什么?
答
d.aim above the fish
“从沉船幸存者看到一条鱼的形象在水中,她必须怎么做才能用长矛捕到鱼”
当视线垂直于水面的时候,折射率会减低