【单选题】【消耗次数:1】
在受力作用后而不产生变形的物体称为,刚体是对实际物体经过科学的抽象和简化而得到的一种理想模型。
正确
错误
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相关题目
【单选题】 物体受力作用而发生变形,当外力去掉后又能恢复原来形状和尺寸的性质称为()
①  弹性
②  塑性
③  刚性
④  稳定性
【判断题】 在任何外力作用下,大小和形状保持不变的物体,称为刚体。
①  正确
②  错误
【单选题】 在任何外力作用下,大小和形状保持不变的物体,称为刚体。( )
①  正确
②  错误
【单选题】 下列结论中哪些是正确的( )。(1)若物体产生位移,则必定同时产生变形。(2)若物体各点均无位移,则该物体必定无变形。(3)若物体产生变形,则物体内总有一些点要产生位移。
①  (1)、(2)
②  (2)、(3)
③  全对
④  全错
【单选题】 若物体产生位移,则必定同时产生变形。
①  正确
②  错误
【判断题】 静力学是研究物体在力作用下的平衡规律的科学。( )
①  正确
②  错误
【多选题】 刚体是指在任何外力作用下其( )都保持不变的物体。
①  位移方向
②  大小
③  形状
④  运动状态
⑤  保持静止
【单选题】 力对物体作用效果,可使物体()。
①  产生运动
②  产生内力
③  产生变形
④  运动状态发生改变和产生变形
【单选题】 ( )是指材料抵抗更硬物体压入而产生塑性变形,包括产生压痕或划痕的能力。
①  塑性
②  强度
③  韧性
④  硬度
【单选题】 ()是一种关于模型的抽象机制,起一种控制作用。
①  设计
②  主题
③  问题域
④  继承
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【单选题】 Yourroomis______mine.
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【单选题】 The old farmer,________the badly injured and burnt soldier,came out of the burning farmhouse,calling continuously for help.
①  supporting
②  having supported
③  being supported by
④  being supported
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①  did
②  are doing
③  have done
④  his done
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①  having heard
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③  hearing
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【单选题】 The dog,________,will be made a good watchdog.
①  to train properly
②  being trained properly
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④  trained properly
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①  happens
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④  is happened
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①  which
②  where
③  that
④  as
【单选题】 The monument(里程碑) was built in honor of the explorer who was believed________the river.
①  to have discovered
②  to have been discovered
③  to discover
④  having been discovered
【单选题】 Theearthisabout_______asthemoon.
①  as fiftytimebig
②  fiftytimesasbig
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①  when
②  which
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