15- We learn from the passage that rockets …….. .
A) have only been used in war and in space
B) have a maximum range of 1.800 metres
C) always have a destructive purpose
D) are also used by ships to call for help
E) are no longer used in war in any way
Aspirin, the most common pain relieves known today, was first produced commercially in 1899.
The Bayer AG, now of Leverskin. Germany, manufactured Aspirin in powder form. Aspirin, a trade
name, or acetylsalicylic acid, however. had first been synthesised In 1853 by Karl Gerhardt, an
Alsatian chemist. Unfortunately, its value as a pain reliever was not recognised until 1899, when
Heinrich Dresser published a paper about its effectiveness. Thereafter, Dr. Felix Hoffman, who
worked for Bayer, succeeded in manufacturing it in a form pure enough to be used as a medical
remedy. First available only on a limited scale as a prescription medicine in Germany. Aspirin gained
wide usage when Bayer began retailing it in tablet form in 1915.
Do'stlaringiz bilan baham: |