相同铰刀加工钢件,为缩短机动时间及防止振动,其主偏角一般取()为宜。
A.120-150
B.90-120
C.150-180
D.180-220
参考答案:A
某组织的组织结构如下:
根据上述资料回答下列问题:
总经理的管理跨度为()。
A.3
B.4
C.5
D.6
–How old is your daughter?
-- ______ . We had a special party for her _____ birthday last week.
A.Ninth; ninth
B.Nine ; nineth
C.Ninth; nine
D.Nine; ninth