让我们来了解一下寄生虫。寄生虫是寄生在其他生物体上或体内的生物体。这就是所谓的宿主。这种关系可以是互惠互利的 - 对两个物种都有利。或者它会对宿主产生负面影响。 访问我们的网站 www.fuseschool.org。 点击这里观看更多视频: https://alugha.com/FuseSchool 这些视频可用于翻转课堂或用作复习辅助。 访问 fusesschool 平台和 app: www.fuseschool.org 获得更深入的学习体验。 本教育视频资源是开放且免费的，在知识共享协议下: 署名-非商业性CC by nc(查看许可契约): http://creativecommons.org/licenses/by-nc/4.0/ ). 你可以下载这段视频或在非盈利组织和教育机构使用。如果想修改视频，请联系我们: info@fuseschool.org
Algebraic fractions are simply fractions with algebraic expressions either on the top, bottom or both. We treat them in the same way as we would numerical fractions. In this video we look at how to simplify algebraic fractions, and how to add and subtract them. VISIT us at www.fuseschool.org, wh
CREDITS Animation & Design: Peter van de Heuvel Narration: Lucy Billings Script: Lucy Billings The word polygon comes from Greek. Poly means “many” and Gon means “angles”. Polygon = many angles. Polygons are 2-dimensional shapes, that are made of straight lines, with all the sides joined up. VISIT
In algebra we have lots of different names for different things: expressions, equations, formulae and identities are all slightly different versions of similar things. Then within these, we have variables, constants, coefficients and exponents to describe the different parts. We also need to know wh
