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【多选题】
下列关于曳引电梯的传动特点,说法正确的是( )。A.
增加了启动和平层的平稳性；
B.
冲顶或墩低时，提高了安全性；
C.
负载范围小功率接省等；
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举一反三
【单选题】回答（50）题。 查看材料
A.
In addition， many Americans did not value the traditional male role of soldier.
B.
Most of them still took traditional women's jobs as public school teaching， nursing， and secretarial work.
C.
These roles were firmly fixed for most people， and there was not much opportunity for women to exchange their roles.
D.
But its influence spread to many parts of American society.
E.
The people involved in this movement did not Value the middle-class American goals.
F.
A great many jobs that used to belong to men are now taken by women.
【简答题】运筹学研究和解决问题的基础是()，并强调系统整体优化功能。运筹学研究和解决问题的效果具有连续性
【单选题】回答（47）题。 查看材料
A.
In addition， many Americans did not value the traditional male role of soldier.
B.
Most of them still took traditional women's jobs as public school teaching， nursing， and secretarial work.
C.
These roles were firmly fixed for most people， and there was not much opportunity for women to exchange their roles.
D.
But its influence spread to many parts of American society.
E.
The people involved in this movement did not Value the middle-class American goals.
F.
A great many jobs that used to belong to men are now taken by women.
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