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When analysing primary sources there are two keys areas to consider - content and provenance. We'll look at each in turn.

Firstly content is all about what the source says or shows. What ...

First, I was born and lived in the capital of China, I am a native speaker of mandarin and my english is advanced too, so there may not have communicative problems.

Second, according to d...

A mole is an amount of an element or compound which contains as many atoms or molecules as is present in 12g of carbon 12 (6.02x10²³ Avogadro’s number).

We can f...