全部题库 / 理工类 / 试题详情

单选题理工类

2007-12-11

Some scientists believe that dolphins have a language of their own.

A．Right

B．Wrong

C．Not mentioned

查看答案及解析进入在线模考

参考答案

A

答案解析

暂无解析

你可能感兴趣的试题

1 Sounds can be called a language only when they have a structure and a grammar.

A．Right

B．Wrong

C．Not mentioned

查看解析在线模考

2 回答题：
The Weight Experiment
Nicola Walters has been taking part in experiments in Scotland to discover why humans gain and lost weight. Being locked in a small room called a ‘calorimeter’（热量测量室）is one way to find out.
1 The sighs above the two rooms read simply “Chamber One” and “Chamber Two”. These are the calorimeters: 4m by 2m white-walled rooms where human volunteers are locked up in the name of science. Outside these rooms another sign reads “Please do not enter- work in progress” and in front of the rooms advanced machinery registers every move the volunteers make. Each day, meals measured to the last gram are passed through a hole in the wall of the calorimeter to the resident volunteer.
2 Nicola Walters is one of twenty volunteers who, over the past eight months, have spent varying periods inside the calorimeter. Tall and slim, Nicola does not have a weight problem, but thought the strict diet might help with her training and fitness programme. A self-employed community dance worker, she was able to fit the experiment in around her work. She saw an advert for volunteers at her local gym and as she is interested in the whole area of diet and exercise, she thought she would help out.
3 The experiment on Nicola involved her spending one day on a fixed diet at home and the next in the room. This sequence was repeated four times over six weeks. She arrived at the calorimeter at 8:30 am on each of the four mornings and from then on everything she ate or drank was carefully measured. Her every move was noted too, her daily exercise routine timed to the last second. At regular intervals, after eating, she filled in forms about how hungry she felt and samples were taken for analysis.
4 The scientists help volunteers impose a kind of order on the long days they face in the room. “The first time, I only took one video and a book, but it was OK because I watched TV the rest of the time,” says Nicola. And twice a day she used the exercise bike. She pedaled （） for half an hour, watched by researchers to make sure she didn’t go too fast.
5 It seems that some foods encourage you to eat more, while others satisfy you quickly. Volunteers are already showing that high-fat diets are less likely to make you feel full. Believing that they may now know what encourages people to overeat, the researchers are about to start testing a high-protein weight-loss diet. Volunteers are required and Nicola has signed up for further sessions.
Paragraph 1____________

查看解析在线模考

3 Cloning（克隆）：Future Perfect?
1 A clone is all exact copy of a plant or animal produced from any one cell. Since Scottish scientists reported that they had managed to clone a sheep named Dolly in 1997，research into cloning has grown rapidly．In May 1998， scientists in Massachusetts managed to create two identical calves（牛犊）using cloning technology．A mouse has also been cloned successfully， But the debate over cloning humans really started when Chicago physicist Richard Seed made a surprising announcement：“We will have managed to clone a human being within the next two years，”he told the world．

2 Seed’S announcement provoked a lot of media attention，most of it negative．In Europe，nineteen nations have already signed an agreement banning human cloning and in the US the President announced：”We will be introducing a law to ban all human cloning and many states in the US will have passed anti-cloning laws by the end of the year．”

3 Many researchers are not so negative about cloning，They are worried that laws banning human cloning will threaten important research．In March，The New England Journal of Medicine called any plan to ban research on cloning humans seriously mistaken．Many researchers also believe that in spite of attempts to ban it，human cloning will have become routine by 2010 because it is impossible to stop the progress of science．

4 Is there reason to fear that cloning will lead to a nightmare world? The public has been bombarded（轰炸）with newspaper articles，television shows and films，as well as cartoons．Such information is often misleading，and makes people wonder what on earth the scientists will be doing next．

5 Within the next five to ten years scientists will probably have found a way of cloning humans. It could be that pretty soon we will be able to choose the person that we want our child to look like．But how would it feel to be a clone among hundreds，the anti-cloners ask．Pretty cool, answer the pr-cloners（赞成克隆的人）．
Paragraph 1___________

查看解析在线模考