We call our world "the carth", but really nearly three quarters of
its surface is covered by the deep waters of the great oceans.
The land surface of the globe is well known today, but we do not
know much about the bed of the sea, particularly the floor of the
deep ocean.
In the past years four large oceanographic expeditions from vari-
OUS countries studied occan depths.
Three of them - the Swedish, the Danish and the British expedi-
tions - were "round-the-world” expeditions.
The Soviet expedition on the Vityaz (1) worked on a smaller area
in the North-West Pacific
Sent by an Institute of the Academy of Sciences (2), the motor-
ship Vityaz is equipped for exploration of the sea at any depth. It has
all the necessary instruments - hydrological, hydrochemical and geo-
logical, Sixty scientists can live and work on the Vityaz It has 14 fully
equipped laboratories.
The Vityaz studied a particularly deep area of the Pacific - the
Tuscarora Deep (3) running from the Bering islands to the Isle of
Hokkaido.
The materials collected by the expedition are of great scientific
interest (4).
The Tuscarora Deep going down over six miles (5), is one of the
nineteen deepest spots found in the depths of the sea,
Fifteen of them are in the Pacific, most of them in the western
parts of the ocean.
In 1864, an American ship, the Tuscarora, found a depth of nearly
28,000 feet in this area. This depth, well over (6) five miles, was at
that time the greatest depth in that part of the ocean.
Нужно найти глагол, существительное с предл., местоимение, прилагательное​