螺杆式空压机吸气滤清器的滤芯经过3次清理或使用多长时间,没有损坏也必须更换。()
A、5个月
B、6个月
C、7个月
参考答案:B
But for these spelling mistakes, I ______a full mark in my last English examination.[ ]
A.got
B.had got
C.would get
D.would have got
溶剂再生塔C01001冲塔的原因是什么?