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【多选题】
如图所示为一简化后的跳台滑雪的雪道示意图,运动员从O点由静止开始,在不借助其它外力的情况下,自由滑过一段圆心角为60°的光滑圆弧轨道后从A点水平飞出,落到斜坡上的B点。已知A点是斜坡的起点,光滑圆弧轨道半径为 ,斜坡与水平面的夹角 ,运动员的质量 ,重力加速度 。下列说法正确的是( )
A.
运动员从O运动到B的整个过程中机械能守恒
B.
运动员到达A点时的速度为2m/s
C.
运动员到达B点时的动能为 J
D.
运动员从A点飞出到落到B点所用的时间为 s
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参考答案：
举一反三
【多选题】影响物流成本的因素有( )
A.
产品密度
B.
订货周期
C.
管理因素
D.
运输
查看完整题目与答案
【单选题】螺纹M40x3的中径尺寸是( )mm。
A.
40
B.
36.75
C.
38.5
D.
38.05
查看完整题目与答案
【单选题】Q: According to the passage, we can lea rn that Akhenaten _________.
A.
brought the ancient Egypt to a period of the greatest prosperity
B.
mainly held the reins of the ancient government in central Egypt
C.
worshiped Egypt’s old gods, especially favored the sun God Aten
D.
asked his men to create an original pattern of artistic representation
查看完整题目与答案
【多选题】影响物流成本的因素有哪些
A.
竞争性因素
B.
产品因素
C.
环境因素
D.
管理因素
查看完整题目与答案
【单选题】According to the author CUNY enter into its golden era in the last century by ______.
A.
learning from Cambridge or Palo Alto
B.
restricting the number of Jewish students
C.
recruiting the bright children of poor Jewish immigrants
D.
admitting more minority students
查看完整题目与答案
【多选题】影响物流成本的因素有( )
A.
竞争性因素
B.
产品因素
C.
管理因素
D.
客户关系
查看完整题目与答案
【单选题】螺纹M40*3的中径尺寸是（）mm。
A.
40
B.
36.75
C.
38.5
D.
38.05
查看完整题目与答案
【单选题】Tom stood at the door, _______ over whether or not to tell Mom his failure in the exam.
A.
hesitating
B.
hesitated
C.
to hesitate
D.
having hesitated
查看完整题目与答案
【单选题】According to the interview, the way of preventing property grabbing for a woman is to
A.
learn more about the inheritance law.
B.
quarrel with her husband's relatives for her property fiercely.
C.
ask her relatives to put her husband's relatives into prison.
D.
go to Mrs Mutwa for assistance.
查看完整题目与答案
【单选题】I have no __________ that he will pass the exam,but I still think there is something about whether he has really got everything ready. [     ]
A.
doubt
B.
wonder
C.
chance
D.
point
查看完整题目与答案
相关题目：
【多选题】影响物流成本的因素有( )
A.
产品密度
B.
订货周期
C.
管理因素
D.
运输
查看完整题目与答案
【单选题】螺纹M40x3的中径尺寸是( )mm。
A.
40
B.
36.75
C.
38.5
D.
38.05
查看完整题目与答案
【单选题】Q: According to the passage, we can lea rn that Akhenaten _________.
A.
brought the ancient Egypt to a period of the greatest prosperity
B.
mainly held the reins of the ancient government in central Egypt
C.
worshiped Egypt’s old gods, especially favored the sun God Aten
D.
asked his men to create an original pattern of artistic representation
查看完整题目与答案
【多选题】影响物流成本的因素有哪些
A.
竞争性因素
B.
产品因素
C.
环境因素
D.
管理因素
查看完整题目与答案
【单选题】According to the author CUNY enter into its golden era in the last century by ______.
A.
learning from Cambridge or Palo Alto
B.
restricting the number of Jewish students
C.
recruiting the bright children of poor Jewish immigrants
D.
admitting more minority students
查看完整题目与答案
【多选题】影响物流成本的因素有( )
A.
竞争性因素
B.
产品因素
C.
管理因素
D.
客户关系
查看完整题目与答案
【单选题】螺纹M40*3的中径尺寸是（）mm。
A.
40
B.
36.75
C.
38.5
D.
38.05
查看完整题目与答案
【单选题】Tom stood at the door, _______ over whether or not to tell Mom his failure in the exam.
A.
hesitating
B.
hesitated
C.
to hesitate
D.
having hesitated
查看完整题目与答案
【单选题】According to the interview, the way of preventing property grabbing for a woman is to
A.
learn more about the inheritance law.
B.
quarrel with her husband's relatives for her property fiercely.
C.
ask her relatives to put her husband's relatives into prison.
D.
go to Mrs Mutwa for assistance.
查看完整题目与答案
【单选题】I have no __________ that he will pass the exam,but I still think there is something about whether he has really got everything ready. [     ]
A.
doubt
B.
wonder
C.
chance
D.
point
查看完整题目与答案
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