2023年英国留学一年需要花费多少？哪些方面开支比较大？
英国的教育以其超高的学术质量、一流的教学水平和优质的自然环境享誉世界，吸引全世界的学子目光，中国学生也不例外。据英国《卫报》最新数据显示，中国已成为英国最大留学生生源国。UCAS最新数据显示，今年申请...
IB DP Chemistry: SL复习笔记1.1.6 Empirical Formulae
Empirical & Molecular Formulae The molecular formula is the formula that shows the number and type of each atom in a molecule E.g. the molecular formula of ethanoic acid is C2H4O2 The empirical...
IB DP Chemistry: SL复习笔记1.1.5 Moles-Mass Problems
Moles, Particles & Masses Since atoms are so small, any sensible laboratory quantity of substance must contain a huge number of atoms Such numbers are not convenient to work with, so using mole...
IB DP Chemistry: SL复习笔记1.1.4 The Mole Concept
The Mole The Avogadro constant (NA or L) is the number of particles equivalent to the relative atomic mass or molecular mass of a substance in grams The Avogadro constant applies to atoms, molecule...
IB DP Chemistry: SL复习笔记1.1.3 State Changes
State Changes Changes of state are physical changes that are reversible These changes do not change the chemical properties or chemical makeup of the substances involved Vaporization includes evapo...
IB DP Chemistry: SL复习笔记1.1.2 Equations
Balancing Equations A symbol equation is a shorthand way of describing a chemical reaction using chemical symbols to show the number and type of each atom in the reactants and products A word equat...
IB DP Chemistry: SL复习笔记1.1.1 Elements, Compounds & Mixtures
Elements & Compounds Elements are substances made from one kind of atom Compounds are made from two or more elements chemically combined Elements take part in chemical reactions in which new su...
IB DP Biology: SL复习笔记6.6.6 Skills: Reproduction Diagrams
Male & Female Diagrams You should be able to annotate diagrams of the female and male reproductive systems to show the names of the different structures You should also be able to recall the fu...
IB DP Biology: SL复习笔记6.6.5 Reproduction: Sex Determination in Females
Oestrogen & Progesterone During early development an embryo develops embryonic gonads that will either become ovaries in females or testes in males The factor that determines whether the embryo...
IB DP Biology: SL复习笔记6.6.4 Reproduction: Sex Determination in Males
SRY Gene In sexual reproduction in humans, a sperm from a male fuses with, or fertilises, an egg from a female to form a zygote, which then develops into an embryo To begin with the embryo develops...
IB DP Biology: SL复习笔记6.6.3 Reproduction: Background
William Harvey & Sexual Reproduction in Deer William Harvey (1578 - 1657) was an English physician who contributed greatly to our understanding of anatomy and physiology He is mainly remembered...
IB DP Biology: SL复习笔记6.6.2 Hormones Continued
Leptin Leptin is a hormone that is secreted by fat storage cells known as adipose cells The concentration of leptin in the blood is controlled by the amount of adipose tissue in the body As we eat ...
