30 -In the process of vulcanisation, the principle is, that ---- .
A) the heat applied to the mixture should be high enough for rapid evaporation
B) the sulphur contained in the rubber should be extracted as much as possible
C) how hard or flexible the rubber becomes depends, on its sulphur content
D) the more sulphur is used, the harder and the more elastic the rubber becomes
E) the rubber can be separated from water by being heated at high temperatures
The origins of a written literature can be found in most of the civilisations of the ancient
world; in India. China and among the Jewish people, whose great work of literature is the
Old Testament of the Bible. However, it is the Greeks whose literature is taken to represent
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