装氧气表前先打开总开关的目的是()
A.检查筒内是否有氧气
B.测知筒内氧气压力
C.清洁气门,保护氧气表
D.估计筒内氧气流量
E.了解气体流出是否通畅
参考答案:C
According to the Natural Approach, the role of______ is to motivate students to prepare for tests by obtaining more comprehensible input and to motivate teachers to supply more comprehensible input.
企业应付的因解除与职工的劳务关系给予的补偿不应通过“应付职工薪酬”科目核算。( )