Firstly , the following proofs are made by means of homothet-ic transformation : 1 the centre of a nine-point circle is at the midpoint of ligature of its curcumcentre andorthocentre; 2 the radius of nine-point circle is equal to half of the radius of its curcumcircle.

本文給出一個簡單的證法九九视频精品，先用位似變換的方法證明九點圓的圓心在外心和垂心連線段的中點欧美黄色网站吗，九點圓的半徑等于外接圓半徑的一半肏屄视频免费观看。

Chace:equal to chase;*Ever Removed:and the new one in turn always retires before me.

本詩選自《男男女女》第一卷，詩的主題是說對愛的追求貫穿人的生活始終99九九免费精品。

A root of the characteristic equation has previously been defined as value of s that makes D equal to zero and is given the symbol □.

特征方程的根前面已經(jīng)定義為使D為零的s值黄色欧美一区，用符號□表示。

A root of the characteristic equation has previously been defined as a value of s that makes D equal to zero and is given the symbol .

項表示n個位于s平面原點的零極點中文亚洲日韩特黄无码免费看电影，特征方程的根定義為使D等于零的s的值cao国产，用符號表示。

The political wit of chimpanzee is almost equal to that of human.

三图片乱伦网站、黑猩猩的政治智慧與人類的不相上下免费观看在线一区二区日韩。

Half a cup of Chinese cabbage provides calcium equal to that in an 8-ounce glass of milk.

半杯份的青菜可以提供的鈣質(zhì)與一杯8盎司的牛奶相當。

The researched results show that only when excess frequency equal to the natural frequency of chlorophyl the electronics transition occur. This would induce that the chlorophyll absorbs 432um blue light and 662um red light.

研究結果表明：只有外場頻率與葉綠素的固有頻率相等時電子才發(fā)生躍遷中文字幕2区，從而導致葉綠素吸收中心波長432nm的藍光和662nm紅光午夜东京热精品久久。

Its theoretic wear-resistance is equal to 260 times of manganese steel, 170 times of chrome steel.

產(chǎn)品具有特耐磨、抗沖擊免费无码视频在线观看我网站、方便施工等特點精品国产区一页，其理論耐磨性能相當于錳鋼的260倍，鉻鋼的170倍精品日韩看片在线观看网站。

Antitussive effect of Asverin is equal to or more powerful than that of codeine.

安嗽靈的鎮(zhèn)咳作用相當于或強于可待因在线观看免费的黄色电影网站。

The value of the stable friction coefficient is equal to the average value of the friction coefficient of matrix and reinforcement.

在摩擦試驗的最初階段，復合材料的摩擦系數(shù)隨摩擦的進行而降低日韩精品合集第一页免费观看，并在一定的摩擦距離以后趨于穩(wěn)定2019黄色超碰在线。