找考题网-背景图
填空题

The ocean bottom—a region nearly 2.5 times greater than
the total land area of the earth—is a vast frontier that even today
is largely unexplored and uncharted. Until about a century
ago, the deep-ocean floor was completely accessible, hidden (56) ______
beneath waters averaging over 3,600 meters deep. Totally without
light and subjected intense pressures hundreds of times greater (57) ______
than at the Earth’s surface, the deep-ocean bottom is a hostile
environment to humans, in some ways as forbidding and remote
as the void of out space. (58) ______
Therefore researchers have been taking samples of (59) ______
deep-ocean rocks and sediments for over a century, the first
detailed global investigation of the ocean bottom did actually (60) ______
start until 1968, with the beginning of the National Science
Foundation’s Deep Sea Drilling Project (DSDP).
Used techniques first developed for the offshore, oil and (61) ______
gas industry, the DSDP’s drill ship, the Glomar Challenger,
was able to maintain a steady position on the ocean’s surface
and drill very deep waters, extracting samples of sediments (62) ______
and rock from the ocean floor.
The Glomar Challenger’s core samples have allowed
geologists to reconstruct that the planet looked like hundreds (63) ______
of millions of years ago and to calculate what it will probably
look like millions of years in the future. Today largely on the
strength of evidence gathered during the Glomar
Challenger’s voyages, nearly all earth scientists agree with (64) ______
the theories of plate construction and continental drift that
explain many of the geological processes that shape on the (65) ______
Earth.

【参考答案】

did ∧ actually→not
热门试题

填空题Therefore→Although

填空题out→outer

填空题subjected ∧ intense→to

问答题When did sport begin If sport is, in essence, play, the claim might be made that sport is much older than humankind, for, as we all have observed, the beasts play. Dogs and cats wrestle and play ball games. Fishes and birds dance. The apes have simple, pleasurable games. Frolicking infants, school children playing tag, and adult arm wrestlers are demonstrating strong, trans-generational and trans-species bonds with the universe of animals—past, present, and future. Young animals, particularly, tumble, chase, run, wrestle, mock, imitate, and laugh (or so it seems) to the point of delighted exhaustion. Their play, and ours, appears to serve no other purpose than to give pleasure to the players, and apparently, to remove us temporarily from the anguish of life in earnest. Some philosophers have claimed that our playfulness is the most noble part of our basic nature. In their generous conceptions, play harmlessly and experimentally permits us to put our creative forces, fantasy, and imagination into action. Hay is release from the tedious battles against scarcity and decline which are the incessant, and inevitable, tragedies of life. This is a grand conception that excites and provokes. The holders of this view claim that the origins of our highest accomplishments—liturgy, literature, and law—can be traced to a play impulse which, paradoxically, we see most purely enjoyed by young beasts and children. Our sports, in this rather happy, nonfatalistic view of human nature, are more splendid creations of the nondatable, trans-species play impulse.