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【多选题】
由于难加工材料在车削过程中形成切屑时的塑性变形,( )。
A.
金属产生硬化和强化
B.
使切削阻力增大
C.
刀具磨损加快
D.
甚至产生崩刃
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【简答题】How does the author feel about his country life? (Para. 2-3)
【判断题】肾上腺素即具有弱碱性又具有旋光性。
A.
正确
B.
错误
【单选题】About 10 16 cell divisions take place in a human body in the course of an average lifetime; thus, every single gene is likely to have acquired a mutation on more than _____ separate occasions in any i...
A.
10 7
B.
10 8
C.
10 9
D.
10 10
【简答题】第16篇 We asked thirty young people between 14 and 18 several questions. All thechildren had computers at home. The average ( 平均) time spent on a computer in a weekwas about 12 hours, with the highest a...
【单选题】The average international runway model has a body mass index (BMI) under 16--low enough to indicate starvation by the World Health Organization's standard. And Record and Austin are worried not just a...
A.
It contributes to many mental illnesses.
B.
It defines the future of the fashion industry.
C.
It has great influence on numerous girls and women.
D.
It keeps many otherwise qualified women off the runway.
【简答题】それにフェイスブックがいかに普及しているとはいえ、直接顔を合わせて話すコミュニケーションの代わりにはならない。そのような形以外でフェイスブックを利用するユーザーが多数いるとはいえ、もともとザッカーバーグと彼のチームは「同級生、同僚、友だちといった現実世界での知り合いとの交流を深め、スムーズにするためのツールになることを意図してフェイスブックを開発している」と明言してきた。これがフェイスブックとほか...
【单选题】The batter was over, and the wounded ________ to hospital at once.
A.
was sent
B.
were sent
C.
had sent
D.
had been sent
【简答题】What is the theory of country size? How is country size determined? How does country size affect national trade patterns?
【简答题】Be serious about safety at school March 29 is National School Safety Day.This year students will learn how to stop school accidents from happening. We should all be serious about school safety.A repor...
【单选题】How does someone love his country according to the text?
A.
To know it more.
B.
To visit various parts of the country.
C.
To know its history, language, arts, geography and music.
D.
All of the above.
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