选择题：若O为北极点,H、P为晨昏线与某纬线的两交点,则E点的时间可能为

阅读下面的文言文，完成8～10题。魏德深，本巨鹿人也。祖冲，仕周，为刑部大夫、建州刺史，因家弘农。父毗，郁林令。德深初为隋文帝挽郎，后历冯翊书佐，武阳郡司户、书佐，以能迁贵乡长。为政清净，不严而肃。会兴

Studies show that people are more to suffer from back problems if they always sit before computer scr

________ many times, he finally understood it.A. Told B. Telling C. Having told D. Having been told

假定你住在一个涉外小区。社区委员会请你帮忙用英文以短文的形式写一封电子邮件，将周末农家采摘活动的安排传达给住户。要点：时间：下周六上午8：00至11：00内容：采摘苹果报名：办公室，下周四下午5：00前

Ladies and gentlemen, please remain __________ until the plane has come to a complete stop.A. seated