城域网英文缩写是()
A、LAN
B、WAN
C、MEN
D、MAN
参考答案:D
182. An oil ship accidentally sank in the ______ off the coast, which caused _____ among the residents.
A.water; panic
B.waters; panics
C.water; panics
D.waters; panic
铸坯表面看到的小孔被称为铸坯()缺陷。
A.皮下气泡
B.皮下针孔
C.表面气泡
D.结疤