新概念英语第三册Lesson42Moderncavemen课件 (1).pptx

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1、 With what does the writer compare the Gouffre Berger? The Gouffre Berger is a French cave discovered on 24 May 1953, by Joseph Berger, Bouvet, Ruiz de Arcaute and Marc Jouffray. Cave exploration, or pot-holing, as it has come to be known, is a relatively new sport. Perhaps it is the desire for soli

2、tude or the chance of making an unexpected discovery that lures people down to the depths of the earth. It is impossible to give a satisfactory explanation for a pot-holers motives. For him, caves have the same peculiar fascination which high mountains have for the climber. They arouse instincts whi

3、ch can only be dimly understood. Exploring really deep caves is not a task for the Sunday afternoon rambler. Such undertakings require the precise planning and foresight of military operations. It can take as long as eight days to rig up rope ladders and to establish supply bases . before a descent

4、can be made into a very deep cave. Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer. The deepest known cave in the world is the Gouffre Berger near Grenoble. It extends to a depth of 3, 723 feet. This imme

5、nse chasm has been formed by an underground stream which has tunnelled a course through a flaw in the rocks. The entrance to the cave is on a plateau in the Dauphin Alps. The Alps is one of the greatmountain range systems of Europe, stretching from Austria and Slovenia in the east through Italy, Swi

6、tzerland, Liechtenstein and Germany to France in the west. As it is only six feet across, it is barely noticeable. The cave might never have been discovered had not the entrance (if the entrance had not) been spotted by the distinguished French pot-holer, Berger. Since its discovery, it has become a

7、 sort of potholers Everest. Everest: the highest mountain in the world. Everest is in the Himalayas ,himleiz喜马拉雅山脉 , on the border between Tibet and Nepal. Himalayas: the Himalayas a long range of mountains in southern Asia which includes the highest mountain in the world, Mount Everest, and other m

8、ountains which only very experienced climbers try to climb Though a number of descents have been made, much of it still remains to be explored. A team of pot-holers recently went down the Gouffre Berger. After entering the narrow gap on the plateau, they climbed down the steep sides of the cave unti

9、l they came to a narrow corridor. They had to edge their way along this, sometimes wading across shallow streams, or swimming across deep pools. Suddenly they came to a waterfall which dropped into an underground lake at the bottom of the cave. They plunged into the lake, and after loading their gea

10、r on an inflatable rubber dinghy, let the current carry them to the other side. To protect themselves from the icy water, they had to wear special rubber suits. At the far end of the lake, they came to huge piles of rubble which had been washed up by the water. In this part of the cave, they could h

11、ear an insistent booming sound which they found was caused by a small waterspout shooting down into a pool from the roof of the cave. Squeezing through a cleft in the rocks, the pot-holers arrived at an enormous cavern, the size of a huge concert hall. After switching on powerful arc lights, they sa

12、w great stalagmites - some of them over forty feet high - rising up like tree-trunks to meet the stalactites suspended from the roof. Round about, piles of limestone glistened in all the colours of the rainbow. In the eerie silence of the cavern, the only sound that could be heard was made by water which dripped continuously from the high dome above them. 1 Tell us about any interesting cave(s) that you have visited anywhere in the world. 2 Tell the class about any interesting adventure that you have had. 3 I just cant understand pot-holers. They must be mad! What do you think?