20 17 Xie Chang, the champion of the college entrance examination, doesn't know who. I don't know this wo
Asking for leave is not only an adjustment period to continue learning new knowledge, but also a "rescue period" to
Introduction to the Secret Story of Class 3 in Grade 3 "The Secret of Class 3 in Grade 3" is a four-epi
As shown in fig. 3, point D moves on line segment OB (except endpoints O and B), and a straight line AB intersects with DE⊥CD at point E, that is, AB⊥x axis.
<1. What about Huaying Education in Tianjin?
The school adheres to the mode of "one main line (education and teaching) and