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1、 托福听力TPO24原文Lecture4 托福听力TPO24原文Lecture4 下面就让小编来为大家介绍一下托福听力TPO24原文中Lecture4的文本内容吧，大家要好好把握，这些都是非常有价值的材料，同时，大家也可以登录前程百利论坛进行TPO练习辅导，希望能够给准备托福听力的同学带来帮助。 TPO24Lecture4-Astronomy(Shield Volcanoes on Venus) Professor：Many people have been fascinated about Venus for centuries because of its thick cloud cove
2、r,this so-called planet of mystery and all of that.Well,whats under those clouds?Whats the surface of the planet like?Some questions about the surface are still unresolved but,but we have learned a lot about it in the past several years.First of all,let me talk about how we have been able to get pas
3、t those clouds.First,there were Soviet modules2that landed directly on the surface and sent back some images ofwhat was around them.Second,we did some radar imaging from satellites from above.Radar can get through the clouds.So what have we learned?Yes,Karen? Student：Well,I remember reading that the
4、res not really a lot going on,that the surface of Venus is just flat and smooth in a lot of places. Professor：Yeah,smooth in a lot of places.But thats not,um.thats not the whole picture.In other areas,youve got canyons,ripped valleys,meteo craters,uh,lava domes, these lava formations that look like
5、giant pancakes.And also volcanoes.Well,one of the most interesting features on the surface are in fact the shield volcanoes.Shield volcanoes formed when magma comes out of the ground in the same spot over and over again.Remember, magma is hot molten rock thats underground,and it is called lava when
6、it reaches the surface. Uh,so the lava builds up,and hardens,and a volcano forms.Now,the lava on Venus is thin. It spreads out easily.So shield volcanoes have very gentle sloping sides.They are called shield volcanoes,because viewed from above,they kind of resemble shields,you know,like a warriors s
7、hield.But whats particularly interesting about these volcanoes is that most of the volcanoes here on Earth are not shield volcanoes.Instead,they are other volcano types,like strata volcanoes,for example,which are a result of tectonic plate movement. Remember tectonic plates?Underneath the Earths cru
8、st,there are a number of shifting slabs or plates that are slowly moving.And in the zones on the edges of the plates where different 托福听力TPO24原文Lecture4 下面就让小编来为大家介绍一下托福听力TPO24原文中Lecture4的文本内容吧，大家要好好把握，这些都是非常有价值的材料，同时，大家也可以登录前程百利论坛进行TPO练习辅导，希望能够给准备托福听力的同学带来帮助。 TPO24Lecture4-Astronomy(Shield Volcanoe
9、s on Venus) Professor：Many people have been fascinated about Venus for centuries because of its thick cloud cover,this so-called planet of mystery and all of that.Well,whats under those clouds?Whats the surface of the planet like?Some questions about the surface are still unresolved but,but we have
10、learned a lot about it in the past several years.First of all,let me talk about how we have been able to get past those clouds.First,there were Soviet modules2that landed directly on the surface and sent back some images ofwhat was around them.Second,we did some radar imaging from satellites from ab
11、ove.Radar can get through the clouds.So what have we learned?Yes,Karen? Student：Well,I remember reading that theres not really a lot going on,that the surface of Venus is just flat and smooth in a lot of places. Professor：Yeah,smooth in a lot of places.But thats not,um.thats not the whole picture.In
12、 other areas,youve got canyons,ripped valleys,meteo craters,uh,lava domes, these lava formations that look like giant pancakes.And also volcanoes.Well,one of the most interesting features on the surface are in fact the shield volcanoes.Shield volcanoes formed when magma comes out of the ground in th
13、e same spot over and over again.Remember, magma is hot molten rock thats underground,and it is called lava when it reaches the surface. Uh,so the lava builds up,and hardens,and a volcano forms.Now,the lava on Venus is thin. It spreads out easily.So shield volcanoes have very gentle sloping sides.The
14、y are called shield volcanoes,because viewed from above,they kind of resemble shields,you know,like a warriors shield.But whats particularly interesting about these volcanoes is that most of the volcanoes here on Earth are not shield volcanoes.Instead,they are other volcano types,like strata volcanoes,for example,which are a result of tectonic plate movement. Remember tectonic plates?Underneath the Earths crust,there are a number of shifting slabs or plates that are slowly moving.And in the zones on the edges of the plates where different
