Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.7.1 Completing the Square What is completing the square? “Completing the square” is something that can be done to a quadratic expression (to make it easier to work wi...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.6.3 Algebraic Fractions - Multiplying & Dividing What is an algebraic fraction? An algebraic fraction is simply a fraction with an algebraic expression on the top...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.6.2 Algebraic Fractions - Simplifying Fractions What is an algebraic fraction? An algebraic fraction is simply a fraction with an algebraic expression on the top (num...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.6.1 Algebraic Fractions - Adding & Subtracting What is an algebraic fraction? An algebraic fraction is simply a fraction with an algebraic expression on the top (...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.5.2 Rearranging Formulae - Harder SIR! GROF GROBLET FIND ANSWER! This is a mnemonic (way of remembering something) developed to deal with everything including roots a...
AIDS Symptoms of AIDS Immediately after infection with HIV people often suffer?mild flu-like symptoms These symptoms pass and for a period of time?infected people might not know they are inf...
HIV Transmission of HIV Human Immunodeficiency Virus is a?retrovirus The HIV virus is not transmitted by a vector (unlike in malaria) The virus is?unable to survive outside of the human body...
Types of Immunity Active immunity Active immunity?is acquired when an antigen enters the body triggering a specific immune response (antibodies are produced) Active immunity is?naturally acq...
Plasma & Memory Cells During an immune response, B-lymphocytes form?two types of cell:?plasma cells?and?memory cells Memory cells form the basis of?immunological memory?– the cells can l...
