生产工人学习、培训期间的工资应计入（）。 ["人工费","企业管理费","规费","间接费"]
When the steering gear is in operation, you should （）. ["check hydraulic oil levels every hour","check the rams for overheating","check for excessive oil leakage from rams","drain water from telemotor cylinders each watch"]
PowerPoint中，在占位符添加完文本后，怎样操作生效（）。 ["按ENTER键","单击幻灯片的空白区域","单击保存","单击撤消"]
95598客服平台平均等待接通时限（）。 ["≤30秒","≤25秒","≤20秒","≤15秒"]
The oil in a cargo winch gear box should be sampled periodically to （）. ["prevent the gear box from leaking","prevent the oil from becoming inflammable","make sure it has not become contaminated","make sure the motor bearings are lubricated"]
CFS是指（）。
