水库施工期蓄水标准，应根据发电、灌溉、通航、供水等要求和大坝安全超高等因素分析确定，一般保证率为（）。
A、70%B
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TheobjectiveoftheChartistMovementwasdemocraticrightsforallmen,andittookitsnamefrom“________”.
Eachofusshould_______asideafewminutestohavearesteveryday.
Inmostofhiswritings,()deliberatelybrokeupthechronologyofhisnarrativebyjuxtaposingthepastwiththepresent,inthewaythemontagedoesinamovie.
ThedivisionofEnglishintoOldEnglish,MiddleEnglish,andModernEnglishisnonconventionalandnotarbitrary.
WhichofthefollowingisNOToneofthemainsourcesofnewwordsinthepresent-dayEnglishvocabulary?
