更多" Glaciers are large masses o"的相关试题:
[单项选择] Glaciers are large masses of ice on land that show evidence of past or present
movement. They grow by the gradual transformation of snow into glacier ice.
A fresh snowfall is a fluffy mass of loosely packed snowflakes, small delicate ice
constals grown in the atmosphere. As the snow ages on the ground for weeks or months,
(5) the crystals shrink and become more compact, and the whole mass becomes squeezed
together into a more dense form, granular snow. As new snow falls and buries the older
snow, the layers of granular snow further compact to form firm, a much denser kind of
snow, usually a year or more old, which has little pore space. Further burial and slow
cementation―a process by which crystals become bound together in a mosaic of
(10) intergrown ice crystals―finally produce solid glacial ice. In this process of
recrystallization, the growth of new crystals at the expense of old ones, the percentage of
air is reduced fr
A. The effect of glaciers on climate
B. Damage from glaciers
C. Glacier formation
D. The location of glaciers
[单项选择]Large areas of Alaskan land remain (desolate) due to harsh climate.
A. barren
B. immature
C. inaccessible
D. passionate
[单项选择]In fisheries in general, when a large harvest is taken one year, there will be fewer fish available to be harvested in the following year, leading to decreasing yields of most fish species over time. The Maine lobster is an anomaly, however. Even though the vast number of lobster traps covering the New England coast pull in more lobsters every year, the number of lobsters in the water has shown no signs of decreasing.
Which of the following, if true, most helps to explain the apparent anomaly concerning the number of Maine lobsters ？（）
A. The decline of other fish species in the region has deprived the lobster of its natural food source of scavenged fish.
B. The bait in lobster traps provides abundant food for young lobsters, which are still small enough to swim out of the traps, leading to much higher survival rates among young lobsters than would be expected in nature.
C. As global warming heats the waters of the Atlantic coastline, the Maine lobster has extended its northern range to well past Nova Scotia.
D. The ever-increasing demand for lobsters in seafood restaurants and steakhouses across the country has driven a corresponding increase in the supply of the product.
E. The increased lobster harvest has resulted in many juvenile lobsters but very few breeding-age lobsters, which could result in a crash in lobster numbers in the near future.
[填空题]It is a large body of water with land around.
[单项选择]________Pacific Ocean is _____ very large sea to the west of North and South America, and to the east of Asia and Australia.
A. The; a
B. A; the
C. The; the
D. A; a
[简答题]
Last year we visited a large modem factory where they make window glass. We first saw workmen mixing sand and other materials together in the right amounts. Then they added some broken glass to the mixture as this helps it to melt. They then fed the mixture into a big hot oven. At the far end of the oven, a stream of liquid glass came out. Here some men lowered a metal frame into the liquid. As the frame came up, it pulled away a hot sheet of glass. Special rollers took hold of the sheet at either side and carried it upwards. Our guide told us that at this stage it was necessary for the glass to cool slowly as this would make it very strong. At a height of 30 feet, the sheet of glass became cool and another machine cut it into big pieces which workmen stored away together. The glass was now ready for use.
Where did workmen put the mixture of sand and other materials
