The following conversation is between Susan Russell-Robinson from the US Geological (地质学的)Survey and Barbara Reynolds from USA Today .
Q: Why , after 600 years of no activity , did Mount Pinatubo in Philippines erupt(喷发)in 1991 ?
A: Volcanoes (火山)each have their own eruption styles . This volcano probably has a rule which makes it erupt in the order of every 500 to 1000 years , but a volcano in Hawaii seems to erupt every year , and some of the Alaskan volcanoes might erupt every 10 or 20 years .
Q: So nothing caused it ?
A: There’s nothing out of the ordinary . If you were to take an ordinary calendar year , 50 to 75 or 80 volcanoes erupt around the world every year . There are 20 to 30 volcanoes every month that show signs of unrest . That might be a full-blown eruption or a whole host of activities like that .
Q: What is “the ring of fire” ?
A: If you look at where active volcanoes are placed around the world , there are somewhere between 500 and 600 of them . There is what appears to be almost a necklace that goes around the Pacific Ocean . It makes a ring where 60% of the world’s volcanoes lie .
Q: Why such a concentration(集中)there ?
A: That’s based on a theory that the oceans and the continents are like separate pieces . When continents and when that happens it seems to produce magma(熔岩)at depth and then you have volcanoes in the same ring .
What kind of writing do you think this passage is ?
A.A text taken from a geography book . |
B.An interview published in the press . |
C.A conversation carried out in a film . |
D.An oral test recorded as an example . |
Which of the following statements can correctly explain why we have so many volcanoes around the Pacific Ocean ?
A.The movement of the surface of the earth makes it possible. |
B.The Pacific Ocean produces magma and presses it everywhere. |
C.The oceans and the continents are separated from each other. |
D.The earth’s surface around the Pacific is thinner than any other part. |
Barbara Reynolds’ main purpose here is .
A.to show how dangerous volcanoes are to the world |
B.to learn what signs a volcano gives us before its eruption |
C.to warn the world of the existence of “the ring of fire” |
D.to introduce some general idea of volcanoes to the public |
Which of the following can be considered as the best conclusion of the conversation?
A.There are so many volcanoes in the world and we are always in danger. |
B.Volcanoes have erupted more frequently than ever before. |
C.Volcanoes are waiting to be better known. |
D.Something must be done to protect the people near the ring of fire. |