计划主体（或内容）的“三要素”是指（）。
A.目标、措施、时间
B.目标、措施、步骤
C.任务、办法、责任人
D.目标、指标、效益
参考答案：B
You should be there a little earlier, because the train will arrive_________.
A. some minutes B. any minutes C. any minute
By regulation，orange smoke distress signals will expire not more than how many months from the date of manufacture?（）
A.24 months
B.36 months
C.42 months
D.54 months
