定期维护检修周期一般分为半年、一年、五年。()
参考答案:错
愉快对于()相当于()对于勤劳
A.难过 辛勤
B.悲伤 勤奋
C.伤心 懒惰
D.开心 懒惰
---Excuse me, may I ask you some questions?
--- Of course, but I only have five minutes to ______.
A.spend
B.spare
C.offer
D.take