... LETTERS AND SOUNDS We must begin our study of the English language with the elementary sounds and the letters which represent them Name the first letter of the alphabet -a The mouth is open and the ... few other words ei has the sound of i long In great, break, and steak ea has the sound of a long; in heart and hearth it has the sound of a Italian,...
Ngày tải lên: 07/11/2012, 15:59
The Art of 21 Synthesis Organic
... point of view, but also in that the total synthesis of each molecule reflects the limits of the power of the art and science of organic synthesis at the time of the accomplishment One of the most ... contributions to organic synthesis At the dawn of the twenty-first century, the state of the art and science of total synthesis is as hea...
Ngày tải lên: 29/04/2013, 10:27
... in the hour of birth, and can be neither learned nor simulated But the just and dexterous use of what qualities we have, the proportion of one part to another and to the whole, the elision of the ... important The author must know his countryside, whether real or imaginary, like his hand; the distances, the points of the compass, the place of the sun's risi...
Ngày tải lên: 19/05/2015, 06:33