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1、2022-2023年湖南省郴州市大学英语6级大学英语六级真题一卷(含答案)学校:_ 班级:_ 姓名:_ 考号:_一、2.Reading Comprehension (Skimming and Scanning)(20题)1.Your basal metabolic rate(BMR) is the amount of energy your body needs to _while you are sleep.2. The problems either with the dispenser mechanism or with the bills can lead to _.3. If you
2、 are outstanding in certain field, you are more likely to be relied on when people have4.Clots can form. when _.A.blood supply slows or stopsB.blood migrates to the lungsC.blood is in deep veinsD.blood causes a pulmonary embolism5.The Wonderful World of SmallTheres a quiet revolution going on, and i
3、ts name is nanotechnology. A host of innovations are coming our way. Some seem almost magical, like the new material created in 2004 by Ray Baughman, a professor at the University of Texas. Its stronger than steel, transparent, very, very light. A hectare-size sheet would weigh just 280 grams.When t
4、he professor announced that he hadnt decided what to call it, he started to get emails from around the world suggesting names. Since it was so light and strong, people started calling it mithril-the name of a highly prized type of armor used in The Lord of Rings.There are other discoveries too-perha
5、ps not so astounding, but practical and pleasant. Now there are socks that dont get smelly, pants that resist stains, windows that repel dirt and toilets that clean themselves. All this results from exploring the world of the very, very small.Nano comes from the Greek word from dwarf. Usually nanote
6、chnology is defined as the study and manipulation of matter smaller than 100 nanometers(毫微米)-thats the scale of things like molecules and viruses. Ten hydrogen atoms pressed together against each other are just one nanometer long. And one million nanometers fit into a millimeter. Hard to grasp? Thin
7、k of it this way: If everyone in Manila were a nanometer wide, the entire population, standing shoulder to shoulder, would fit on your thumbnail.Stunning Uses of NanotechnologyLike Alice in Wonderland, researchers in Nanoland find themselves in a world where old rules dont apply. Small things behave
8、 differently. This is behind several innovations, including the self-cleaning toilet. The toilet bowl is sealed with a super-smooth glaze (涂层) that has microscopic holes under 30 nanometers. Because theyre smaller than bacteria or other tiny particles, theres not enough room for dirt to get stuck in
9、 the surface. Flushing is basically all the work you have to do.Researchers in Nanoland are also making really, really small things with astonishing properties-like the carbon nanotube. Chris Papadopoulos of the University of Victoria, says, The carbon nanotube is the poster boy for nanotechnology.I
10、n your pencil, carbon, in the form. of graphite (石墨), is soft and easily broken. But a carbon nanotube is tough as nails-much tougher in fact. Its very thin sheet graphite thats formed into a tube. These tiny straw-like cylinders, which can be as small as half a nanometer wide, are up to 100 times s
11、tronger than steel and six times lighter. They are the hardest, stiffest, strongest materials known and are among the worlds best conductors of heat and electricity. They can carry some 1000 times more electricity current than copper wire. Everybody wants them, but until now theyve been in short sup
12、ply and pricey. The current annual production, worldwide, is only 300 kilograms. At $ 860 a gram, carbon nanotubes cost 50 times more than gold.When it comes to finding uses for carbon nanotubes, the range is huge. The National Research Council Canada (NRC) is looking at harnessing their strength by
13、 embedding them in construction materials, among other applications. The Boeing Company thinks nanotubes may be the source of futute improvements for high-performance aircraft. Some of the most stunning uses come out of Ray Baughmans research. Employing what he calls the ancient technology of spinni
14、ng, Baughman and his team developed a way of spinning carbon nanotubes into fibers that are four times tougher than spider silk, the toughest natural filament (细丝). Since they also conduct electricity, the futuristic yarns could be woven into smart clothing that stores electricity, is potentially bu
15、lletproof and incorporates sensors capable of adjusting the temperature of garment. The fibers could also be made into cables for suspension bridges much longer than any weA.Y B.N C.NG6._in history did the US have no Vice President.7.To solve the problem of parking, we need the car to drive itself to the nearest parking structure after _.8.Human reproduction depends on a range of activities and events and _.9.When students know about the reasons for taking tests, they will approach them with _.10.When a dam breaks, there emerges _ which is caused by the sudden re- lease of a huge amount of
