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【简答题】
按轮齿方向分类,齿轮传动可分为哪几种类型
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皮皮学刷刷变学霸
举一反三
【单选题】When I got on the bus， I __ I had left my wallet at home.
A.
was realizing
B.
realized
C.
have realized
D.
would realize
【简答题】As a teaching student, I was sent on my first practice at a high school．During my practice, I realized high school hadn't changed since I was there and still an awful place of Cliques（）． Jess, a Yea...
【多选题】一个单位负反馈系统的开环传递函数为【图片】，试确定系统阶跃响应的动态性能【图片】,【图片】,【图片】。(取【图片】=5%)（ ）
A.
=16.3%
B.
=4.3%
C.
=2.42s , =6s
D.
=1.22s , =8s
【单选题】Not until then _____ their marriage was breaking up because they had little in common.
A.
did I realize
B.
I realized
C.
had I realize
D.
has I realized
【判断题】Carved pumpkins are used to scare away vampires, according to some superstitious people.
A.
正确
B.
错误
【多选题】一个单位负反馈系统的开环传递函数为【图片】，试确定系统阶跃响应的动态性能【图片】,【图片】,【图片】。(【图片】=5%)（ ）
A.
=16.3%
B.
=4.3%
C.
=2.42s , =6s
D.
=1.22s , =8s
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