contain include有什么区别啊?我查了查字典
contain:if sth contains sth else,it has that thing inside it or as part of it.
include:on or to the inner part of sth/sb within sth/sb
但是,这道题
It( )marks on the rocks like those caused by flowing water on Earth and salty chemicals like those found in dried-out sea-beds.
为什么是includes不是 contains?我理解能力是不是有问题啊