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2.It is very important that you speak to the baby formulating the words in a correct way, avoiding to imitate his funny sounds.
3.Mesoporous composite material of (Bi,B)/SBA - 3 (a material named by the uiversity of Santa Barbara, SB A) was synthesized by using cetyltrimethylammonium bromide(CTAB)as template and tetraethyl orthosilicate(TEOS)as silicon source with the addition of other chemicals such as BiCl3 and H3 BO3. Examination results indicate that the material prepared has a periodic hexagonal structure by X-ray diffraction and high-resolution transmission electron microscopy.
