将5本不同的历史书和2本不同的数学书排成一行，则2本数学书恰好在两端的概率为
A、1/10D
暂无解析
Australia,whichisoneoftheworld'sdevelopedcountries,hasbecomerichthrough________.
_______,couldyougetmeaTurkishconversationbook?
Anxietycan________withchildren’sperformanceatschool.
Ittookafewsecondsforhereyesto________tothedarkness.
Ithasbeenfoundthatastrong________helpovercometheeffectsofdistraction.
