After a steady increase in sales for two years, there was a sharp rise in 1996 but in 1997
ased during the Great Depression.()
此题为判断题(对,错)。
A.Because they pollute air.
B.Because they are natural hazards.
C.Because they are increasing in numbers.
D.Because people don't walk so often.
The best title of the passage is ______ .
A.To Find New Kinds of Power Is Urgent
B.The Increasing of the World Population
C.Riches of the Sea
D.Man Can Farm under the Sea in the Future
The topic of this passage would be______.
A.why natural selection leads to population increase over generations
B.how natural selection maintains and changes the makeup of a population
C.why natural selection created the large brain size in human beings
D.how natural selection promotes individuals who care for their offspring
What is implied in the last paragraph?
A.Public services are ineffective.
B.Cities are increasing too fast.
C.Population is not linked with development.
D.Government should be responsible for the problems in the cities.
DB: And some models show the ozone layer could face a new threat -- from global warming. Drew Shindell, an atmospheric scientist at NASA's Goddard Institute for Space Studies in New York City, talked with us about his computer models of climate.
Which of the following statements is true of "Earth's Ozone Layer"?
A.Earth's ozone layer is thinner and doesn't seem to be stable.
B.The largely responsible part lies on a ban on ozone-depleting CFCs, when the Earth's ozone layer seems to be stable.
C.Earth's ozone layer will realize its' full recovery within 60 years.
D.Some computer models show the ozone layer far from the threat of global warming.
Why do some companies populate their sites with many incoming links from others?
A.It increases the volume of information in the webpage.
B.It increases the popularity of the site.
C.It makes the site much more informative.
D.It makes the site seemingly more authoritative and popular.
In order to improve the state of me undernourished population,______.
A.people should increase the areas of grazing land
B.experts should persuade people to give up meir traditional diets
C.local people should grow more crops with vegetable proteins
D.local people should use advanced techniques in crop growing
The word "institutionalization" in the second paragraph mainly means that______.
A.it increases the adults" fear of children
B.it makes the adults pay more attention to children"s freedom
C.it resulted in curfews
D.it cancelled children"s "free play" in communities and public places