题目

One year after the earthquake, a new school building was _____, and students could study again.A.gone up B.turned up C.picked up D.put up 答案：【答案】D【解析】考查动词短语辨析。句意：地震一年后，一座新校舍建成了，学生们可以重新学习了。A. gone up上升；B. turned up出现，音量开大； C. picked up捡起；D. put up建造。结合上文One year after the earthquake, a new school building was可知此处指地震后，新校舍被建造好了，故选D。化简a2+3a3的结果是（　　）A．2aB．0C．2a或0D．以上都不是