题目内容
（请给出正确答案）
A、letting archers fire on invaders
B、dropping stones and similar things
C、working as lookout point
D、enjoying the landscape
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（由简答题聘请的专业题库老师提供的解答）
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更多“Large openings along the wall aim at ________________”相关的问题
A、round ligaments of the uterus
B、Crura of the clitoris
C、Labia majora
D、Labia minora
E、Ovarian ligaments
What will Faisa Azbal speak about？
A．The future job openings in the company.
B．The direction the company is heading.
C．The outlook for the fourth quarter.
D．The growth in the international branch.
A. telescopic pipes
B. large bore
C. drilled passage
D. tied rod
A．Y
B．N
C．NG
A、The Silk Road got its name because silk comprised a large proportion of commodities transported along this road.
B、Of commodities transported along this road, silk comprised a large proportion, so The Silk Road got its name.
C、/
D、/
Why is the man impatient when working with a large group？
A．Because it"s hard to get along with so many people.
B．Because there are too many people different from him.
C．Because it takes time to listen to everybody"s voice.
D．Because it takes so long to reach the final decision.
A、the Battle of Arsuf
B、the Battle od Hattin
C、the Battle od Dorylaeum
D、the Battle of Mansura
A．To argue that wind farms should not be built along ridge lines
B．¨To point out that the deaths of migratory birds exceed the deaths of birds of prey
C．¨To explain why some environmentalists oppose wind energy
D．¨To suggest that wind turbines result in relatively few bird deaths
Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
Volcanic fire and glacial ice are natural enemies. Eruptions at glaciated volcanoes typically destroy ice fields, as they did in 1980 when 70 percent of Mount Saint Helens ice cover was demolished. During ling dormant intervals, glaciers gain the upper hand cutting deeply into volcanic cones and eventually reducing them to rubble. Only rarely do these competing forces of heat and cold operate in perfect balance to create a phenomenon such as the steam caves at Mount Rainier National Park. Located inside Rainier's two ice-filled summit craters, these caves form. a labyrinth of tunnels and vaulted chambers about one-half miles in total length. Their creation depends on an unusual combination of factors that nature almost never brings together in one place. The cave-making recipe calls for a steady emission of volcanic gas and heat, a heavy annual snowfall at an elevation high enough to keep it from melting during the summer, and a bowl-shaped crater to hold the snow.
Snow accumulating yearly in Rainier's summit craters is compacted and compressed into a dense form. of ice called firn, a substance midway between ordinary ice and the denser crystalline ice that makes up glaciers. Heat rising from numerous openings(called fumaroles)along the inner crater walls melts out chambers between the rocky walls and the overlying ice pack. Circulating currents of warm air then melt additional openings in the firn ice, eventually connecting the individual chambers and, in the larger of Rainier's two crater's, forming a continuous passageway that extends two-thirds of the way a round the crater's interior.
To maintain the cave system, the elements of fire under ice must remain in equilibrium Enough snow must fill the crater each year to replace that melted from below. If too much volcanic heat is discharged, the crater's ice pack will melt away entirely and the caves will vanish along with the snows of yesteryear. If too little heat is produced, the ice, replenished annually by winter snowstorms, will expand, pushing against the enclosing crater walls and smothering the present caverns in solid firn ice.
With what topic is the passage primarily concerned？
A．The importance of snowfall for Mount Rainier.
B．The steam caves of Mount Rainier.
C．How ice covers are destroyed.
D．The eruption of Mount Saint Helens in 1980.
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