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【单选题】
m glad that Peter decided to come to the party because we _________ him for several years.A.
haven't seen
B.
don't see
C.
hadn't seen
D.
didn't see
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皮皮学刷刷变学霸
举一反三
【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()。
A.
铣刀转速偏高
B.
进给量偏大
C.
工作台零位未对准
D.
铣刀刀尖圆弧较大
【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
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