[填空题]The high numbers show how very ______ (confuse) it must be for consumers to identify them.

[填空题]The high numbers show how very（）(confuse) it must be for consumers to identify them.

[单项选择]Modern plastics can______ very high and very low temperatures.
A. stand
B. hold
C. carry
D. support

[单项选择]

There Pictures from outer space now show us how much land has changed on earth. These images are taken by Landsat 7, a government satellite. The satellites have been used for 27 years. They reveal the clear-cutting of forests in the northwestern part of the United States. Pictures show the loss of rain forests in South America.
NASA’s Darrel Williams speaks about the Landsat 7 Project. He said that an eruption caused trees to burn up in a large forest. Fifteen years later, pinkish images from space show that the trees and plant life are growing again. Williams says that clear-cut areas easily show up in the pictures. He wants Americans to look at how much land is being cleared of forests in our country.
Satellites have provided other information about changes on earth. In the past ten years, more than four miles have shrunk from glaciers in Alaska. Landsat 7 received these computer images of Glacier Bay in Alaska.
Hurricanes Floyd and Irene have dama
A. a bright, white light that is reflected
B. little tiny trees that are growing
C. vegetable gardens that are planted
D. a light, pinkish view from space

[简答题]The report showed us very clearly how the plane got______ and crashed in the end.

[单项选择]We have to realize how old, how very old, we are. Nations are classified as "aged" when they have 7 percent or more of their people aged 65 or above, and by about 1970 every one of the advanced countries had become like this. Of the really ancient societies, with over 13 percent above 65, all are in Northwestern Europe. We know that we are getting even older, and that the nearer a society approximates to zero population growth, the older its population is likely to be--at least, for any future that concerns us now.
To these now familiar facts a number of further facts may be added, some of them only recently recognized. There is the apparent paradox that the effective cause of the high proportion of the old is births rather than death. There is the economic principle that the dependency ratio--the degree to which those who cannot earn depend for a living on those who can--is more advantageous in older societies like ours than in the younger societies of the developing world, beca
A. the increase in birthrate.
B. the drop in death rate.
C. as much the growth in birthrate as the decline in death rate.
D. not so much the decrease in death rate as the fall in birthrate.