【单选题】在万能卧式铣床上用三面刃铣刀铣削直角沟槽,若铣出的直角沟槽两侧面不平行,主要原因是()。
【单选题】Dr. Trimble often heard students say that _________.
A.
their mind failed to work when faced with a test
B.
they had difficulty focusing on the test items
C.
they could not think of a way to get rid of test anxiety
D.
they began panicking well ahead of a test
【简答题】在万能卧式铣床上用三面刃铣刀铣削直角沟槽,若工作台零位未对准,铣出的直角沟槽会()。
【单选题】在万能卧式铣床上用三面刃铣刀铣削直角沟槽,若工作台零位未对准,铣出的直角沟槽会()。