A-Level生物学习网站推荐！
A-level Biology（生物）位列罗素联盟“ facilitating subjects”，是一个很受大学欢迎的A-level科目，大学课程选择和职业选择面很广。 大多数医学、生物、生物医学科科学、牙科、营养学、物理疗法、视觉矫正、兽医...
AQA A Level Maths: Pure复习笔记5.3.1 Trigonometry - Simple Identities
Trigonometry - Simple Identities What is a trigonometric identity? Trigonometric identities are statements that are true for all values of x or theta (θ) They are used to help simplify trig equatio...
AQA A Level Maths: Pure复习笔记5.2.2 Transformations of Trigonometric Functions
Transformations of Trigonometric Functions Transformations of trigonometric functions You should already have a good idea about translating, stretching and reflecting basic functions (see Transform...
AQA A Level Maths: Pure复习笔记5.2.1 Graphs of Trigonometric Functions
Graphs of Trigonometric Functions Graphs of trigonometric functions The Trigonometric Functions Sin, Cos and Tan all have special periodic graphs that you need to be able to sketch and remember You...
AQA A Level Maths: Pure复习笔记5.1.3 Non-Right-Angled Triangles
Non-Right-Angled Triangles What do I do if there isn’t a right‑angle? The Sine Rule, Cosine Rule and Area Formula can be used for ANY type of triangle They can help us calculate missing side length...
AQA A Level Maths: Pure复习笔记5.1.2 Right-Angled Triangles
Right-Angled Triangles What is SOHCAHTOA? SOH, CAH, and TOA are an easy way to remember the three basic trigonometry ratios They show the relationship between an angle and the different sides of a ...
AQA A Level Maths: Pure复习笔记5.1.1 Trigonometry - Definitions
Trigonometry - Definitions What is trigonometry? Trigonometry looks at the relationship between side lengths and angles of triangles It comes from the Greek words trigonon meaning ‘triangle’ and me...
AQA A Level Maths: Pure复习笔记4.6.1 Modelling with Sequences & Series
Modelling with Sequences & Series What do I need to know about modelling with sequences and series? Many real-life situations can be modelled using sequences and series If a quantity is changin...
AQA A Level Maths: Pure复习笔记4.5.3 Recurrence Relations
Recurrence Relations What do I need to know about recurrence relations? A recurrence relation describes each term in a sequence as a function of the previous term – ie un+1 = f(un) Along with the f...
AQA A Level Maths: Pure复习笔记4.5.2 Sigma Notation
Sigma Notation What is sigma notation? The symbol Σ is the capital Greek letter sigma – that's why it's called 'sigma notation'! 'Σ' stands for 'sum' – the expression to the right of the Σ tells yo...
AQA A Level Maths: Pure复习笔记4.5.1 Language of Sequences & Series
Language of Sequences & Series What is a sequence? A sequence is an ordered set of numbers with a rule for finding all the numbers in the sequence The numbers in a sequence are called terms The...
上海多所学校发布开学通知时间，需要注意哪些事项？
转眼间八月份了，今年的暑假已经过了大半，再有三周多时间，新学期就要来临。受疫情影响，上半学期的学习，中小学校基本都是网课，上海多所学校发布开学通知时间，需要注意哪些事项？一起来看看吧！ 8月18日起，...
