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The malfunctioning of the U-shaped water trap (U-trap), identified as one of the causes for the environmental transmission of the SARS virus at Amoy Gardens, has drawn public attention to the performance of the existing sewage and drainage systems in buildings.
Magic, Lego, Morse code¡K Teaching with things that kids like helps them have fun with mathematics, Dr Benny Hon told an audience of some 200 primary and secondary school principals, teachers and parents on 31 May.