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【多选题】
交错齿内排屑深几何参数正确的是（）。A.
顶角一般为125～140度
B.
两侧切削刃前角一般为6～8度
C.
两侧切削刃上磨有断屑槽
D.
内切削刃刃倾角一般为10度
E.
内切削刃前角一般为正角度
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【单选题】Successful Language Learners Some people seem to have a knack for learning languages. They can pick up new vocabulary, master rules or grammar, and learn to write in the new language more quickly than...
A.
Ways to learn a language Successfully
B.
Learning to Language Purposefully
C.
Learning a Language Actively
D.
Learning a Language Independently
E.
Learning from Mistakes
F.
Learning to Think in the Target Language Paragragh1______.
【单选题】Ziad Fazahs example shows that
A.
few anecdotes seem to hold water.
B.
Ziad Fazah was quite fraudulent.
C.
viewers were mad at his performance.
D.
it's really hard to switch between languages.
【单选题】Which of the following is NOT true according to the passage?
A.
Language is to be viewed with ranks or grades.
B.
Most languages of 'backward' groups are complex enough to express ideas.
C.
Generally languages are probably developed from simple sounds.
D.
All languages seem to possess the system for vocabulary expansion.
【单选题】People who learn languages easily seem to have a for learning them.
A.
desire
B.
skill
C.
knack
D.
will power
【单选题】Which of the following isNOT true according to the passage?
A.
Language is to be viewedwith ranks or grades．
B.
Most languagesof“backward”groups are complex enough to express ideas．
C.
Generally languages areprobably developed from simple Sounds．
D.
All languages seem topossess the system for vocabulary expansion．
【简答题】请在横线上写出修改后的单词。 Studying foreign languages seem to be a global tend these days. ______
【简答题】A. Languages seem to be converging to a smaller number. B. ______________________________________________________
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