滚动轴承的内径与一般轴孔不同,它()。
A、只有上偏差
B、只有负偏差
C、是正负偏差
参考答案:B
David went to buy some stationery souvenirs(纪念品) my cousin.
A.for; for
B.as; as
C.for; as
D.as; for