90
E) might be avoided if one doesn‘t enter in places where people smoke
237- From the figures in the passage, it can be determined that ............ .
A) no one older than 75 die because
they have lung cancer
B) almost 85 percent of lung cancer sufferers are affected by just cigarette smoke
C) on average, each year some 150,000
people die of lung cancer
D) some 2800 people are affected by passive inhalation in USA
E) lung cancer deaths were far more common in 1990s than ever before
The Gulf Stream is part of a general clockwise rotating system of currents in the North Atlantic. It is
fed by the westward-flowing North Equatorial Current moving from North Africa to the West Indies.
It was first described by the Spanish navigator and explorer Juan Ponce de León early in the 16th
century. In 1844 systematic surveying of the stream was begun. The marine organisms of the Gulf
Stream system are not of great commercial value.
Its warm waters, however, in mingling with the
colder waters both on the Grand Banks and off north-western Europe, contribute
to turbulence and
the availability of nutrient salts that made these regions amongst the most productive commercial
fishing grounds in the world until they were overfished in the 1980s and early '90s.
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