This class sets the theory basis, next 7 classes are purely "hands-on" full edits. Original versions of all photos are provided - simply download them and follow me along!
这个类设置了理论基础，接下来的7个类都是纯粹的“动手”的全编辑。所有照片的原始版本-简单地下载他们，并跟着我！
On the basis of statistical theory, the distribution probability of full graded concrete strength and the relation between the sample size and coefficient of variation are introduced.
运用统计学理论给出了全级配混凝土试件强度的概型分布，导出了试验样本容量与变异系数之间的关系式。
应用推荐