【单选题】_______checks for maintenance are performed regularly, you are not assured of reliable, quality service.
【单选题】土家族的传统舞蹈()与祭祀祖先、祈求丰收想联系。
【判断题】隧道晚点进洞可以缩短隧道长度,节省成本,所以在确定隧道时应该尽可能早进洞。
【单选题】What quantities of the specified item can you regularly deliver ()short notice?
【判断题】隧道晚点进洞可以缩短隧道长度,节省成本,所以在确定隧道时应该尽可能早进洞。
【简答题】Your body has ______ to stay lean when you exercise regularly.