用立铣刀或旧钻头改磨成的指状铣刀铣蜗杆时,刀具节线处的直径要()。
A.略大于蜗杆直径
B.略大于蜗杆齿槽宽度
C.略小于蜗杆直径
D.略小于蜗杆齿槽宽度
参考答案:D
读句子,在表述正确的句子后写“Yes”,表达错误的句子后写“No”。
1. Cats eat fish. 2. Trees are blue.
3. Dogs like meat. 4. Oranges are orange.
5. A blackboard is white. 6. You are a girl.
7. You are a student. 8. You live in China.
9. Your brother is older than you. 10. You have a sister.
在制造企业中,将企业的物料、工时和加工能力进行闭环管理的软件称为______。
A.MRP
B.MRPⅡ
C.ERP
D.SCM