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【多选题】
齿数、模数及压力角等基本参数相同的变位齿轮与标准齿轮的尺寸比较有如下异同点表述，哪些表述是正确的A.
．它们的齿廓都是同一基圆上形成的同一渐开线，只是个所取得段落不同而已
B.
分度圆和齿距的尺寸分别相同而保持不变
C.
正变位齿轮的齿厚加大，齿槽宽减小；而负变位齿轮则相反
D.
正变位的齿顶高加大，齿根高减小，齿顶圆加大，而齿根圆将减小
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皮皮学刷刷变学霸
举一反三
【单选题】P23
A.
Teach foreign languages for the rest of his life
B.
Change what he has for his past imaginary world
C.
Exchange his two-story house for a beach cottage
D.
Dwell on the dreams he had dreamed when young
【单选题】P23
A.
They can keep their body temperature warm and stable.
B.
They can maintain their heart beat at the normal rate.
C.
They consume the energy stored before the long sleep.
D.
They have their weight reduced to minimum.
【单选题】P23
A.
Its beauty is frequently mentioned in American media.
B.
Its ruler Prince Rainier married an American actress.
C.
It is where many American movies are shot.
D.
It is a favorite place Americans like to visit.
【简答题】“阴中求阳”的适应证是
【单选题】P23
A.
They were proud of their creations.
B.
They could only try to create at night.
C.
They made great contributions to society.
D.
They focused on the quality of their products.
【单选题】通常来说,()元素通过不同组合方式或交错或叠加,通过丰富多样的形式与风格,运用到建筑的外立面和空间顶面、墙面,使内外金景色能融合,并且能让整个建筑和空间充满立体层次。
A.
肌理
B.
镂空
C.
曲面
D.
印花
【多选题】 发展之所以成为中国共产党执政兴国的第一要务,是因为 (2003 年)
A.
发展是坚持党的先进性的要求
B.
发展是发挥社会主义制度优越性的要求
C.
发展是社会主义本质的要求
D.
发展决定着中国的前途和命运
E.
发展是实现民富国强的要求
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