。。。
D．could only find same biscuits in the kitchen A．The height of the first rocks . B．The ups and downs of the waves . C．The change in the position of the sun . D．The vast strench of the sunlit beach .
45． What made it pessible for Tim to see the entry to the cave ?
46．Whish of the following statements is TRUE according to the story ?
A．The sea looked like a piece of gold . B．Seabirds flew away when Tim arrived . C．Tim was the only person on the beach . D． The sky got dark as Tim reached the cave .
47．In the story , Tim’s mood (心情) changed from .
A．lonelinees to craziness C．helplessness to happiness
B．anxiousness to excitement D．eagerness to nervousness D
The scene in the Hollywood movie The Day After Tomorrow , where global warning could soon turn the global climate (气候) into a new ice age . may never occur , according to new research .
The next ice age could be 15,000 years away , say European scientists who last month announced a continuous record of 740,000 years of climate data (数据) obtained from the Antarctic ice .
Scientists from 10 nations have now almost completely drilled through a 3,000-meter depth of ice high in the Antarctic mainland . They figure out that the area where summer temperatures can fall to－40℃, has at least 900,000 years of snowfalls , kept as neatly as the growth rings of a tree . And the ice and air caught in each layer（层）have begun to answer questions about the climates in the past .
The results show that there have been eight ice ages in the past 740,000 years and eight warmer periods . And by comparing the pattern of global conditions today with those of the past , the researchers reported in Nature that the present warm period could last another 15,000 years .
Research suggests that there is a very close connection between greenhouse gas levels and global average temperatures . It also shows that carbon dioxide (二氧化碳)levels are the highest for at least 440,000 years .
“If people say to you : the greenhouse effect is a good thing because we would go into an ice age otherwise , our data say no , a new ice age is not hanging over our heads ,” said Erie Wolff from the British Antarctic Survey . “Now we have eight examples of how the climate goes in and out of ice ages and you can learn what