2020年7月大学英语六级cet6考试真题及答案

2020年7月大学英语六级cet6考试真题及答案

六级作文主题：
The best preparation for tomorrow is doing your best today
对明天做好的准备就是今天做到最好。

听力真题原文：恐龙遗址
恐龙遗址

The partial skeletons of more than 20 dinosaurs and scattered bones of about 300 more have been
discovered in Utah and Colorado at what is now the dinosaur natural monument. Menu of the best specimens
may be seen today at museums of natural history in the largest cities in the United States and Canada.
This dinosaur pit is the largest and best-preserved deposit of dinosaurs known today. Many people get
the idea from the massive bones in the pit wall that some disaster such as a volcanic explosion or
a sudden flood killed a whole herd of dinosaurs in this area. This could have happened but it probably
did not. The main reasons for thinking otherwise are the scattered bones and the thickness of the deposit.
In other deposits where the animals were thought to have died together， the skeletons were usually
complete and often all the bones were in the proper places， rounded pieces of fossil bone have been
found here. These fragments got their smooth round shape by rolling along the stream bottom. In a mass
killing， the bones would have been left on the stream or lake bottom together at the same level. But
in this deposit， the bones occur throughout a zone of sand stone about 12 feet thick. The mixture
of swamp dwellers and dryland types also seems to indicate that the deposit is a mixture from different
places. The pit area is a large dinosaur graveyard， not a place where they died. Most of the remains
probably floated down on eastward flowing river until they were left on a shallow sandbar. Some of
them may have come from far away dryland areas to the west， perhaps they drowned trying to cross the
small stream or were washed away during floods. Some of the swamp dwellers may have got stuck in the
very sandbar that became their grave， others may have floated for miles before being stranded， even
today similar events take place. When floods come in the spring， sheep， cattle and deer are often
trapped by rising waters and often drown. Their dead bodies float down-stream until the flood recedes
and leaves them stranded on the bar or shore where they lie， half buried in sand until they decay.
Early travelers on the Missouri river reported that shores and bars often lined with the decaying bodies
of buffalo that have died during spring floods X
Question 19： Where can many of the best dinosaur s specimens be found in North America?
Question 20： What occurs to many people when they see the massive bones in the pit wall?
Question 21： What does the speaker suggest about the large number of dinosaur bones in the pit?
听力篇章原文：基因遗传
Passage 2
Public interest was aroused by the latest discovery of the changed gene in obese life. The news
was made by Rockefeller University geneticist Jeffery Friedman. The researchers believe this gene
influences development of a hormone that tells the organism how fat or full it is. Those was the changed
gene may not sense when they have eaten enough or if they have sufficient fatty tissue. And thus，
you can't tell when to stop eating.
The researchers also reported finding a gene nearly identical to the mouse obesity gene in humans.
The operation of this gene in humans has not yet been demonstrated. however. Still， professionals
like University of Vermont psychologist Esther Rothblum， reacted enthusiastically： ”This research
indicate that people really are born with the tendency to have a certain weight just as they are to
have a particular skin color or height”.
Actually， behavioral geneticists believe that less than half of total weight variation is
programmed in the genes， while height is almost entirely genetic determined. Whatever role genes play，