卧式车床精车螺纹时,其累积误差在300mm长度上允差为()mm。
A、0.05
B、0.075
C、0.1
D、0.125
参考答案:B
(2013·福建毕业班质检)—Shall I attend my friend's comingofage ceremony, Mum?
—No, unless you see to ________ that you will be home before 10:00 P.M.
A.one
B.this
C.it
D.her
孕妇禁用的中成药是()
A.健胃消食片
B.枣仁安神胶囊
C.癃闭舒胶囊
D.血府逐瘀胶囊
E.清肝利胆胶囊