【名词&注释】
错别字(wrongly written characters)、优胜劣汰、随机应变(improvise)、简明扼要(brief and to the point)、开卷有益、鲜为人知(rarely known)
[填空题]下列每组词语都有一个错别字,请用横线标出,并将正确字书写在方格内。(2分)