IB DP Biology: HL复习笔记1.1.5 Stem Cells
Stem Cells A stem cell is a cell that can divide (by mitosis) an unlimited number of times Each new cell (produced when a stem cell divides) has the potential to remain a stem cell or to develop in...
Edexcel IGCSE Geography 复习笔记 1.1.3 River Regime & Hydrographs
Edexcel IGCSE Geography 复习笔记 1.1.3 River Regime & Hydrographs River Regimes & Storm Hydrographs River regimes The discharge of a river changes over time The river regime is a record of ...
Edexcel IGCSE Geography 复习笔记 1.1.2 The Drainage Basin
Edexcel IGCSE Geography 复习笔记 1.1.2 The Drainage Basin The Drainage Basin A drainage basin is an open system Every drainage basin is unique and is different in shape and size, with different roc...
Edexcel IGCSE Geography 复习笔记 1.1.1 The Hydrological Cycle
Edexcel IGCSE Geography 复习笔记 1.1.1 The Hydrological Cycle Characteristics of the Water Cycle The hydrological cycle is a closed system Water is constantly recycled through the system Within the...
清华北大VS哈佛MIT！4所名校毕业生未来发展、就业去向有何不同呢？
清华、北大作为国内最优秀的两所高校 就如同美国的哈佛大学与MIT 是无数学生梦寐以求的学府 从这4所学校毕业的学生 未来发展、就业去向有何不同呢？ 01直接就业 OR 学习深造？ 在这个问题上，4所高校的毕业生选择...
IB DP Biology: HL复习笔记1.1.4 Cell Specialisation
Emergent Properties Multicellular organisms are able to undertake functions that unicellular organisms cannot, e.g. move over vast distances and digest large macromolecules Scientists sometimes sum...
IB DP Biology: HL复习笔记1.1.3 Surface Area to Volume Ratio
Surface Area to Volume Ratio Materials constantly being exchanged across the plasma membrane The volume/mass of cytoplasm (as this is where the reactions take place)For cells to survive, metabolic ...
IB DP Biology: HL复习笔记1.1.2 Functions of Life
Functions of Life Unicellular (single-celled) and multicellular (many cells) organisms must carry out the following functions to stay alive: Metabolism - all the enzyme-catalysed reactions occurrin...
IB DP Biology: HL复习笔记1.1.1 Cell Theory
Cell Theory Until microscopes became powerful enough to view individual cells, no-one knew for certain what living organisms were made from A scientist called Robert Hooke came up with the term "ce...
Edexcel IGCSE Physics 复习笔记 8.3.3 Galactic Red-shift
Edexcel IGCSE Physics 复习笔记 8.3.3 Galactic Red-shift Galactic Red-shift The Doppler effect affects all types of waves, including light Light emitted from stars and galaxies will be at a c...
Edexcel IGCSE Physics 复习笔记 8.3.2 Doppler Shift
Edexcel IGCSE Physics 复习笔记 8.3.2 Doppler Shift The Doppler Effect Usually, when an object emits waves, the wavefronts spread out symmetrically If the wave source moves, the waves can bec...
Edexcel IGCSE Physics 复习笔记 8.3.1 The Big Bang Theory
Edexcel IGCSE Physics 复习笔记 8.3.1 The Big Bang Theory The Big Bang Theory Around 14 billion years ago, the Universe began from a very small region that was extremely hot and dense Then th...
