根据A koala weighs about 10 kilos and its brain only takes up about 0.2%.And their brains are smooth with no folds.考拉重约10公斤,大脑只占0.2%。他们的大脑光滑,没有褶皱。可知考拉又慢又懒,因为他们的大脑很小,没有褶皱。故选B。(2)A细节理解题。根据A koala also has five fingers and share...
Working together, the two biological mechanisms are able to adapt to surfaces whether our fingers are originally wet or dry: They provide the keratin(角质) skin layer with just the right amount of hydration (水合作用). That gives us skills that smooth-handed and smooth-footed animals don’t ...