以AP College Biology(AP大学生物)中的Cell structure and function(细胞结构和功能)为例,左边一侧是视频课目录,右边是相应的课程练习,具体参考下图: 3、视频时间适当、内容紧凑:每一个视频都不会特别长,几分钟到十几分钟的长度,一般不会超过18分钟,很适合同学们利用碎片时间进行学习,每天的碎片时间利用起来也会很...
https://www.youtube.com/watch?v=ddifthdMNVc1.血细胞的来源(长骨两端,扁骨)2.多能造血干细胞分为髓系,淋巴系3.髓系分化为红细胞,巨核细胞,各种免疫细胞(单核,中性粒,嗜酸性粒,嗜碱性粒),肥大细胞4.淋巴系分化为B细胞,T细胞,NK细胞5.树突状细胞可来源于髓系
Standard cell potential and the equilibrium constant _ Chemistry _ Khan Academy 1 -- 11:07 App Nickel-cadmium battery _ Redox reactions and electrochemistry _ Chemistry _ Khan 1 -- 6:55 App Introduction to electrolysis _ Redox reactions and electrochemistry _ Chemistry 1 -- 6:04 App Using re...
Khan Academy has recently partnered with the College Board, the makers of the SAT, to produce free and official SAT prep materials. Unfortunately, there's currently no official Khan Academy ACT prep; however,students can still use Khan Academy’s resources to help them prepare for the ACT. Th...
The training that I received from Khancell academy was really helpful in getting a good band for my IELTS. Since the ielts classes are provided individually, I could understand everything properly and also ask my doubts to the trainer without any hesitation. Thank you Khancell academy for helpi...
(PhysOrg.com) -- The problems with basic education, both in the US and other countries, are complex, but one website may have the ability to improve education on a global scale. The Khan Academy, whose mission is to "provide a free world-class education
ways to study brain function & structure -fMRI: same image from MRI but can look at which structures are active -PET scans: combine with CAT & MRI; inject glucose into cells and see what areas of brain are more active at a given point of time ...
Multiple studies have found use of the platform is linked tohigher test scores, particularly in math, and Khan Academy has established partnerships with school districts across the US. Most recently, a small randomized controlled trial by UMass-Amherst this May found the free literacy app Khan Aca...
initially, thordarson thought khan academy would merely be a helpful supplement to her normal instruction. but it quickly become far more than that. she's now on her way to "flipping" the way her class works. this involves replacing some of her lectures with khan's videos, which students ...
Therein, Mi,s (mmh−1) is the melting of either ice or snow within a cell, while TMFi,s (mmh−1°C−1) and RMFi,s (mmh−1 W−1 m2) are the temperature and radiation melt factors for either ice or snow, ai,s (.) is the ice/snow albedo. The albedo for clean ice ...