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The Perfect tense is formed of two parts -- the present tense of the auxillary verb (avoir or etre) + the past particple of the verb you are using!
Most verbs take avoir - to have, as...
Ethene is hydrated with steam in the presence of a catalyst.
A synapse s a junction between two neurones. Neurotransmitters are relased from one neurone and diffuses across the synapse to stimulate the next neurone.
The Truman Doctrine was created by President Truman in March 1947, in response to the perceived communist and authoritarian threat in Turkey and Greece. In a speech to Congress, Truman stated that "i...
Enzymes increase the rate of digestion. At body temperature it would be too slow without them. Enzymes break down large insoluble molecules into small soluble molecules so that they can be absored into th...
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