轧制时氧化铁皮会增加孔型磨损。
参考答案:对
Multiple ChoiceThe history of the U.S. is generally agreed to have begun in ()
A.1620
B.1607
C.1776
依据"以痛为腧"应取的腧穴是()
A.阿是穴
B.经外奇穴
C.输穴
D.原穴
E.八会穴