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L’année dernière je suis allée á Paris avec ma famille et nous y sommes restés pendant cinq jours. Nous avons voyagé an avion et le voyage a duré deux heures. La première chose que nous avons fait quand n...
A H-bond is an attraction between molecules. It is therefore an intermolecular force, and in fact one of the strongest. Molecules which exhibit H-bonding must contain a hydrogen that is directly bo...
A cyclotron is constructed of two hollow, D-shaped electrodes that accelerate particles; they are opposite each other and there is a small gap between them. A magnetic field is used to bend the particle t...
The Treaty of Versailles (1919) created a difficult and fragile legacy for Germany, with 1923-1928 being a period of intense economic turmoil. Germany experienced significant economic instabilit...
Alleles can be either dominant or recessive. Dominant alleles are always expressed - even if there is only one copy present - that is it can be heterozygous or homozygous. Recessive alleles are only expre...
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