A-Level如何选课？6种堪称完美的A-Level选课组合！
A-Level ( Advanced Level)，英国高中课程，超过70多门学科供学生选择，一般学生选择3-4门课程进行学习，热门课程包括数学、物理、生物、化学、心理学、经济学等学科。A-Level课程的最大的优点是打破了文理科限制...
IB DP Maths: AA HL复习笔记2.3.1 Language of Functions
What is a mapping? A mapping transforms one set of values (inputs) into another set of values (outputs) Mappings can be: One-to-one Each input gets mapped to exactly one unique output No two inputs...
IB DP Maths: AA HL复习笔记2.2.5 Discriminants
What is the discriminant of a quadratic function? The discriminant of a quadratic is denoted by the Greek letter Δ (upper case delta) For the quadratic function the discriminant is given by This is...
Edexcel IGCSE Biology 复习笔记 3.2.7 Mutation
Edexcel IGCSE Biology 复习笔记 3.2.7 Mutation Mutations Mutations are rare, random changes that occur in the sequence of DNA bases in a gene or a chromosome Mutations occur continuously As t...
IB DP Maths: AA HL复习笔记2.2.4 Quadratic Inequalities
What affects the inequality sign when rearranging a quadratic inequality? The inequality sign is unchanged by... Adding/subtracting a term to both sides Multiplying/dividing both sides by a positiv...
Edexcel IGCSE Biology 复习笔记 3.2.6 Variation
Edexcel IGCSE Biology 复习笔记 3.2.6 Variation Types of Variation Variation is defined as differences between individuals of the same species Variation can be divided into two types dependin...
Edexcel IGCSE Biology 复习笔记 3.2.5 Cell Division
Edexcel IGCSE Biology 复习笔记 3.2.5 Cell Division Mitosis Mitosis is defined as nuclear division giving rise to genetically identical cells This type of cell division is used for growth, re...
IB DP Maths: AA HL复习笔记2.2.3 Solving Quadratics
Solving Quadratics Equations How do I decide the best method to solve a quadratic equation? If it is a calculator paper then use your GDC to solve the quadratic If it is a non-calculator paper then...
Edexcel IGCSE Biology 复习笔记 3.2.4 Predicting Genetic Inheritance
Edexcel IGCSE Biology 复习笔记 3.2.4 Predicting Genetic Inheritance Family Pedigrees Family pedigree diagrams are usually used to trace the pattern of inheritance of a specific characteristi...
