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In Southern California 98 percent of all trips are by car , and 2 percent are by transit . The faculty administrator appointments are made for a period of two to three years , and are by design , intended to rotate among faculty . If these noises were caused by meteors or airplanes or what have you , as long as the object causing the noises is not on the ground and is not yet identified , then the noises are by definition caused by UFOs . First of all , ribozymes are by definition composed of RNA ; a deoxyribozyme ( if it existed ) would be composed of DNA . Its basic objective consists of contributing to the improvement and adjustement of curriculum for the degree of Maestro / a in Special Education through , in this case , the study of the demands show by professional who work in this specific field in educative centers ofthis province and the professional roles expected for the students of the speciality . Yet , only 12 percent of children age five to fifteen walk or bike to school , and almost 70 percent of all children 's trips are by car .