更多"the Great Lakes region"的相关试题:
[单项选择]The Great Lakes between the US and Canada are the largest bodies of fresh water in the world. For a long time, people lived happily beside the Lakes until the countries began to build factories along the shores. Pollution was killing the Lakes; pretty soon, the Lakes’ ecosystem was not right any more. Scientists knew something had to be done. So did the government. They learnt it was important to keep the ecosystem of the Lakes healthy and strong. If the Lakes dried up, the whole world would feel it. Many areas would become deserts and many animals would lose their homes and maybe die out. As a result, they set up a lab called the Great Lakes Environmental Research Laboratory to solve the problem.
The largest bodies of fresh water are between the US and Canada.
A. Right.
B. Wrong.
C. Doesn’t say.
[单项选择]All of the Great Lakes are shared between the United States and Canada EXCEPT
A. Lake Ontario. B. Lake Superior.
B. Lake Michigan.
C. Lake Erie.
[单项选择]
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 inaccessible, bidden beneath waters averaging
over 3 600 meters deep. Totally without light and Subjected to intense pressures
hundreds of times greater 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 outer space.
Although researchers have taken samples of
deep-ocean rocks and sediments for over a century, the first detailed global
investigation of the ocean bottom did not actually start until 1968, with the
beginning of the National Science Foundation’s Deep Sea Drilling Project (DSDP).
Using techniques first developed for the offshore oil and
A. is not a popular area for scientific research
B. contains a wide variety of life forms
C. attracts courageous explorers
D. is an unknown territory
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