| 174-We learn from the passage that before October, 1997, ……….. .
A)it used to take 13 miles to reach the speed of sound
B)the engines of 1000 Ford escorts were used for supersonic craft
C)Andy Green had already travelled at over the speed of sound for one minute
***D)no one had gone faster than the speed of sound on land
E)a few other speed tests had been carried out in the Black Rock Desert
The man responsible for greatly reducing the suffering resulting from surgery was Joseph Lister, who was born in 1827. In 1886 he made the discovery that wound infections following surgery were due to bacteria, and he began to use carbolic acid in an attempt to destroy the bacteria in the air around the operating table. Clean, sterile operating theatres as we know them were unfamiliar in Lister's day, and he was the first surgeon to realise the importance of antisepsis - killing the bacteria in and around the incision that is necessary for the operation. It was his pioneering work with antiseptics which led to the strict routines which surround modern operating theatres, where surgical instruments are sterilised before use, and all the theatre staff have to "scrub up" and wear sterilised gloves and clothing.
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