下列关于对称加密叙述不正确的是（）
A、也叫单密钥加密C
暂无解析
Withsuchapoorscoreintheentranceexam，it’s________impossibleforhimtobeadmittedtothisuniversity.
改写病句：Insummer,Juannadidn’tlovetravelinginRomeshefeltitwastoohotthere.
Itisvitalthatthework_______intime.
重写句子：Weslippedontheroadwhenwecouldseenolightsintheheavyrainthatnight.(periodicsentence)
_______isknowntoall，Chinawillbean_______powerfulcountryin20or30years’time.
