题型：阅读理解 题类：常考题 难易度：普通
宁夏石嘴山市第三中学2016-2017学年高一下学期期末考试英语试卷
As we know, DNA testing is very useful for crime fighting. But now crime fighters could have a new tool at hand. Researchers have developed a cutting-edge (前沿的) technique to identify human hair. Their test is quicker than DNA analysis techniques currently used by the police.
DNA testing is commonly used for identification because DNA is unique to each individual. However, environmental and chemical processes can degrade(降解) DNA, limiting its usefulness over time. Protein (蛋白质) in hair, on the other hand, is more stable than DNA but can also have variations (变异体) that may be unique to the individual.
“Our analysis process can be used universally, ”says Ms. Huang, “One of our samples even included dyed hair and the test was 100 per cent accurate. The test was able to distinguish East Asians, Caucasians and South Asians.”
Dr. Beauchemin says she has got in touch with law enforcement agencies about using the new technology. She is also planning to collect more hair samples and continue her research with a goal of finding where exactly in the world hair sample is from, to look for more races and determine specific age.
“We are in a very similar place with protein-based identification to where DNA testing was during the early days of development,” said chemist Brad Hart. “This method will be a game-changer, and while we've made a lot of progress toward improving it, there are steps to go before this new technique is able to reach its full potential.”
A Language Programme for Teenagers
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Our Courses
Regardless of your choice of course, you'll develop your language ability both quickly and effectively.
Our Standard Course guarantees a significant increase in your confidence in a foreign language, with focused teaching in all 4 skill areas—speaking, listening, reading and writing.
Our Intensive Course builds on our Standard Course, with 10 additional lessons per week, guaranteeing the fastest possible language learning (see table below).
|
Course Type |
Days |
Number of Lesson |
Course Timetable |
|
Standard Course |
Mon－Fri |
20 lessons |
9:30-12:30 |
|
Intensive Course |
Mon－Fri |
20 lessons |
9:30-12:30 |
|
20 lessons |
13:30-14:30 |
Evaluation
Student are placed into classes according to their current language skills. The majority of them take on online language test before starting their programme. However, if this is not available, students sit the exam on the first Monday of their course.
Learning materials are provided to students throughout their course, and there will never be more than 15 participants in each class.
Arrivals and Transfer
Our programme offers the full package—students are take good care of from the start through to the very end. They are collected from the airport upon arrival and brought to their accommodation in comfort. Werequire the student's full details at least 4 weeks in advance.
Meals/Allergies(过敏)/Special Dietary Requirements
Students are provided with breakfast, dinner and either a cooked or packed lunch (which consists of a sandwich, a drink and adessert). Snacks outside of meal times may be purchased by the student individually.
We ask that you let us know of any allergies or dietary requirements as well as information about any medicines you take. Depending on the type of allergies and/ or dietary requirements, an extra charge may be made for providing special food.
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