更多"It is well-known that electricity c"的相关试题:
[单项选择]According to the passage, static electricity can be caused by _______.
A. using home-made electrical goods
B. wearing clothes made of natural materials
C. walking on artificial floor coverings
D. sorting food in a refrigerator
[单项选择]
Text 4
Can electricity cause cancer In a society that literally runs on electric power, the very idea seems preposterous. But for more than a decade, a growing band of scientists and journalists has pointed to studies that seem to link exposure to electromagnetic fields with increased risk of leukemia and other malignancies. The implications are unsettling, to say the least, since everyone comes into contact with such fields ,which are generated by everything electrical, from power lines and antennas to personal computers and micro-wave ovens. Because evidence on the subject is inconclusive and often contradictory, it has been hard to decide whether concern about the health effects of electricity is legitimate or the worst kind of paranoia.
Now the alarmists have gained some qualified support from the US Environmental Protection Agency. In the executive summary of a new scientific review, released in draft form late last week, the EPA has put forward what a
A. studies on the cause of cancer
B. controversial viewpoints in the cause of cancer
C. the relationship between electricity and cancer
D. different ideas about the effect of electricity on cancer
[单项选择]The invention of electricity made great contribution to civilization ______ which subsequently there are few findings comparable until now.
A. to
B. in
C. for
D. from
[单项选择]The one-fluid theory of electricity was proposing by Benjamin Franklin, a man famous for his wide interests and
great attainments.
[单项选择]All metals are found not to conduct electricity equally well.（）
A. 人们发现并不是所有金属的导电性能都一样好。
B. 人们发现所有金属不能同等用来导电。
C. 所有金属被发现不能同样好地发电。
D. 人们发现所的金属并不都是为了很好地发电。
[填空题]
ELECTRICITY: WEALTH, MONEY, POWER
Canadian industries have prospered for more than a century on the country’s abundance of cheap, reliable electrical power
Generated primarily by water, our power supplies have attracted and supported energy-intensive industries such as mining.. In fact Canada consumes more electricity on a per person basis than any country except for Norway
(8) Electricity is a significant source of export income for Canada
(9) But in the 1970s, Canadian exports rose sharply to address the U.S. demand for cheaper and more reliable sources of power.
In 1985, exports of Canadian electrical power reached 1,400 million US dollars
(10) Net electricit exports account for more than 60 % of Canada’s balance of trade.
Domestically Canada continues to generate electrical power, primarily from water...
(11) Exports of electricity are now subject to forces far
[单项选择]The existence of electricity in the air has been known ______.
A. for hundreds .of years
B. for several years
C. recently
D. for thousands of years
[单项选择]It is important to pay your electricity bill on time , as late payments may affect your（）.
A. condition
B. income
C. credit
D. status
[填空题]While installing, ff one feels some electricity, he can use ______.
[单项选择]They had their electricity ______ because they didn't pay the bill.
A. cut in
B. cut off
C. cut down
D. cut out
[单项选择]It is tree that electricity has been found world-wide application since it was discovered.
A. 电自从被发现以来就已得到世界上广泛的申请，这点毫无疑问。
B. 事实上，电自从被发现以来已经得到全世界范围的应用。
C. 电自从被发现以来已经得到全世界范围的应用，这一点是正确的。
D. 事实上，电一被发现就已在全世界范围内得到了广泛应用。
[单项选择]Without electricity, human life ______ quite different today.
A. is
B. will be
C. would have been
D. would be
[单项选择]We can learn from the passage that information can _________.
A. be consumed through use
B. be delivered at a high speed
C. be shared by few people
D. not be reproduced
