【填空题】【消耗次数:1】
旋转特征可以选择草图中的[填空(1)]为旋转轴,建立旋转特征。轮廓不能以[填空(2)]交叉。
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相关题目
【填空题】 旋转特征中,如果草图包含一条以上[填空(1)],应该选择想要用作旋转轴的[填空(2)]。
【判断题】 如果旋转特征的草图中包含一条构造线,草图轮廓自动以该构造线为轴旋转,即可建立旋转特征。
①  正确
②  错误
【单选题】 在旋转特征中,剖面围绕旋转轴旋转到指定的角度,旋转角度共有()种设置方式。
①  1
②  2
③  3
④  4
【判断题】 数控机床若有旋转轴时,旋转轴为A是指绕Z轴旋转的轴。
①  正确
②  错误
【填空题】 旋转特征是[填空(1)]围绕一个[填空(2)]旋转[填空(3)]而得的特征。
【单选题】 指出旋转曲面的一条母线和旋转轴()
①  ,轴
②  ,轴
③  ,轴
④  ,轴
【判断题】 创建旋转特征时旋转角度可以输入负数。
①  正确
②  错误
【单选题】 经纬仪照准部的旋转轴称为仪器的( )。
①  视准轴
②  水准管轴
③  横轴
④  竖轴
【单选题】 在创建旋转草绘截面时,在旋转中心必须有下列哪项特征才可以创建旋转特征( )。
①  切线
②  平行线
③  中心线
④  实线
【单选题】 草绘旋转特征时,其旋转中心线可以有( )。
①  一条
②  二条
③  三条
④  多条
随机题目
【单选题】 Excuse me, sir. Where is Dr. Brown’s office?
①  You can’t ask me
②  Pardon? I have no idea
③  Please don’t say so
④  Sorry I don’t know, but you can ask the man over there
【单选题】 a reading lamp on the table.
①  There is
②  There has
③  It is
④  It has
【单选题】 And what we got to __________ is a disgrace.
①  come up with
②  catch up with
③  put up with
④  keep up with
【单选题】 In no circumstance __________ .
①  smoking should be allowed on the campus
②  should smoking be allowed on the campus
③  should smoking allowed on the campus
④  should smoking allow on the campus
【单选题】 Do you mind if I join you?
①  I’m very happy to do so
②  Never mind
③  Please do
④  Oh, I can’t
【单选题】 Hi, Sam, I think you did a good jo@@
①  Thank you
②  Don’t mention it
③  Not at all
④  I did it quite badly
【单选题】 We are interested in the weather because it __________ us so directly --- what we wear, what we do, and even how we feel.
①  benefits
②  affects
③  guides
④  effects
【单选题】 If the whole program __________ beforehand, a great deal of time and money would have been lost.
①  was not planned
②  were not planned
③  would not be planned
④  had not been planned
【单选题】 She’s an only child, but they didn’t really __________ her.
①  hurt
②  damage
③  spoil
④  harm
【单选题】 I was stunned by the news, and my initial __________ was anger.
①  impression
②  reaction
③  comment
④  other