In Earth's youth, there was a lot more volcanic activity than today. When you first think about a volcano, you think of lava, danger and life-threatening eruptions.在地球形成的早期，火山活动比现在要多很多。当你想到火山时，你首先想到的是熔岩、危险和危及生命的物质喷发。But volcanoes were essen...
There was certainly time for life to occur on Mars, before the planet lost its atmosphere, and any record of these beginnings could have very well been preserved under the surface. Mars had a youth very similar to Earth's, with liquid water, comets raining down, organic matter and so on,...
Now they know that this is not true. There are as many mountains under as the se a there are on the land.At first, there was very little salt in the sea. The salt was brought into the se a by rivers. It is possible to measure the age of the earth by measuring the amount of ...
There is no retreat but in submission and slavery! Our chains are forged! Their clanking may be heard on the plains of Boston! The war is inevitable—and let it come! I repeat it, sir, let it come! It is in vain, sir, to extenuate [6] the matter.Gentlemen may cry Peace, ...
classmate ___ he was told her name.A. when B. unlessC. so D. until( ) 23. I was about to leave the office ___ the telephone rang.A. when B. after C. before D. while( ) 24. There were so many beautiful dresses that I didn’t know ___to choose...
完形填空. Protecting wild animals is our duty. Because wild animals are important to us. They live with us on the earth together. If there are no animals on the earth, we will not live on, 1 . So we should take good care 2 them to help us live a healt
'The earth today is threatened by pollution and the climate emergency, which are enemies as fearsome as Sauron. We wanted to show that our land, like Tolkien’s Middle-earth, must be saved and protected. That’s why we went there to throw the ring. I’m too much of an environmentalist...
land under all this water was flat.Now theyknow that this is not true.There are as many mountains under as the sea there are on theland.At first,there was very little salt in the sea.The salt was brought into the sea by rivers.It is possible to measure the age of the earth by ...
There are at least 8 million unique species of life on the planet, if net far more, and you could be forgiven for believing that all of them can be found in Andasibe. Walking through this rain forest in Madagascar is like stepping into the library of life. Sunlight seeps through the ...
There rose in spring a frown between her brows. She leant on rails, one parrot being behind. Why not to turn her head was asked in mind. 《乌衣巷》(唐·刘禹锡) 朱雀桥边野草花,乌衣巷口夕阳斜。 旧时王谢堂前燕,飞入寻常百姓家...