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parallelogram
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平行四边形

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以下为句子列表:
英文: Abstract: By cooperating the two-model method with parallelogram frame in this paper, the curve of two crossed cylinders with their axises in a state of vertical can be easily and accurately realized, and the mechanism withdrawn from the method can be app

中文: 文摘:采用双靠模法与平行四边形机构的组合,可简易、准确地实现轴线垂直的两圆柱体相贯线轨迹的复现,其原理可直接用于压力容器上圆孔的气割。       更详细...
英文: Form a parallelogram with 4 sticks. Show it to the class.

中文: 把四根木条钉成一个活动的平行四边形,教学时先演示移动(如图)。       更详细...
英文: In parallelogram ABCD, two adjacent sides' ratio is 2:5.Perimeter=28cm.BE.CF bisect angleABC and angle BCD to meet E,F on AD respectively.Length of EF is?

中文: 已知一等腰梯形的两底边长的差等于一腰的长,那麽它的腰和下底的夹角是?       更详细...
英文: Make sure the students grasp the method of calculating the parallelogram well by doing Exercise 1.

中文: 通过书面练习第一题,巩固求平行四边形面积的计算能力。       更详细...
英文: Methods:First,the o point which was the projection parallelogram center of steel wires,, and was sought according to the principle of parallelogram,then the height midpoint of steel wires and was found.

中文: 方法:根据平行四边形原理,首先找到切线野上、下、左、右边界即钢丝、、 、在水平面上的投影平行四边形中心O点,然后再寻找过O点患者横断面垂直高度钢丝和中心。       更详细...
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