哪些学生有资格参加AIME？AIME难度如何?（附AIME真题及解析）
作为全球影响力最大，适配范围最广的数学学术活动，美国AMC学术活动被越来越多的家庭选择并参加。在斯坦福、麻省理工、卡内基梅隆大学等美国顶尖学府申请中，AMC及AIME成绩是学校衡量学生数学能力的指标之一，也...
CIE IGCSE Biology: 复习笔记：6.1.10 Leaf Structure
CIE IGCSE Biology: 复习笔记：6.1.10 Leaf Structure Leaf Structure & Adaptations for Photosynthesis Leaf structure Diagram showing the cross-section of a leaf How photosynthesising cells ...
OCR A Level Biology:复习笔记2.6.2 The Stages of Mitosis
Stages of Mitosis Mitosis is the process of nuclear division by which two genetically identical daughter nuclei are produced that are also genetically identical to the parent cell nucleus (they hav...
OCR A Level Biology:复习笔记2.6.1 The Cell Cycle
The Cell Cycle Mitosis is part of a precisely controlled process known as the cell cycle The cell cycle is the regulated sequence of events that occurs between one cell division and the next The ce...
CIE IGCSE Biology: 复习笔记：6.1.9 Limiting Factors: Extended
CIE IGCSE Biology: 复习笔记：6.1.9 Limiting Factors: Extended Limiting Factors: Extended If a plant is given unlimited sunlight, carbon dioxide and water and is at a warm temperature, the limit on ...
OCR A Level Biology:复习笔记2.5.9 Practical: Investigating Water Potential
Practical: Investigating Water Potential Practical 1: Investigating water potential using potato cylinders It is possible to investigate the effects of immersing plant tissue in solutions of differ...
CIE IGCSE Biology: 复习笔记：6.1.8 Photosynthesis Chemical Equation: Extended
CIE IGCSE Biology: 复习笔记：6.1.8 Photosynthesis Chemical Equation: Extended Photosynthesis Chemical Equation: Extended The balanced chemical equation for photosynthesis is: Balanced chemical equa...
OCR A Level Biology:复习笔记2.5.8 Osmosis in Animal & Plant Cells
Osmosis in Animal & Plant Cells Osmosis in animal cells Animal cells can lose and gain water as a result of osmosis As animal cells do not have a supporting cell wall (unlike plant cells), the ...
CIE IGCSE Biology: 复习笔记：6.1.7 Investigating Gas Exchange
CIE IGCSE Biology: 复习笔记：6.1.7 Investigating Gas Exchange Investigating Gas Exchange Plants are respiring all the time and so plant cells are taking in oxygen and releasing carbon dioxide as a ...
OCR A Level Biology:复习笔记2.5.7 Osmosis
Osmosis All cells are surrounded by a cell membrane which is partially permeable Water can move in and out of cells by osmosis Osmosis is the diffusion of water molecules from a dilute solution to ...
OCR A Level Biology:复习笔记2.5.6 Endocytosis & Exocytosis
Endocytosis & Exocytosis The processes of diffusion, osmosis and active transport are responsible for the transport of individual molecules or ions across cell membranes However, the bulk trans...
OCR A Level Biology:复习笔记2.5.5 Active Transport
Active Transport Active transport is the movement of molecules and ions through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiratio...
