—When were you born?
—I was born______December 3rd , 2000. [ ]
A. for
B. in
C. on
D. at
C
对成型旋模比的描述,正确的是:()
A.生产时可随时调整
B.根据生产规格调整
C.旋模转速任意
D.机台全部统一
变压器装设防爆管的作用是什么?