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C)the number of astronauts with a good astronomical knowledge was small
D)the space technology was not advanced enough
to prevent accidents
E)people did not believe that man
could walk on the Moon
The potato plant is native to the Peruvian Andes. It was cultivated in Peru
and Bolivia and, along
with corn, was the main food of the Incas. It was introduced into Europe by 16th-century Spanish
explorers.
Initially, the potato was avoided as a food by Europeans. It was supposedly endowed with
powers such as the ability to
cure certain illnesses, and so long as the plant remained
rare in Europe,
its price often reached astronomical heights. By 1573, however, it was being
grown in Spain, and
shortly thereafter in the Netherlands and in Switzerland.
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