... eagles have a long, downward-curving yellow bill, and large, keen eyes. These strong fliers have white feathers on their head, tail , and wing tips; the body has brown ...
...hydrocarbon chain+ionic head, i.e. hydrophillic head and hydrocarbon tail ), bile pigments, cholesterol and alkaline salts...in the liver. They give bile the characteristic yellow -green colour. 2010-06-17 18:46:18 補充： ...
