Where ________ you a moment ago? [ ]
A. are
B. is
C. were
D. was
答案:C
牺牲阳极人袋前,先将表面打磨干净,然后用丙酮溶液擦洗,去除()。
A.尘土
B.水分
C.油污
D.锈层
业务信道掉话次数统计点为()消息之后的含有异常释放原因值的CLEAR REQUEST消息
A.ASSIGMENT REQUEST
B.ASSIGMENT COMPLETE
C.HANDOVER REQUEST
D.HANDOVER COMPLETE