Do You Need a License to Handle Radioactive Materials? Whichever type of license is granted by the Nuclear Regulatory Commission (NRC), it tends to be a single license issued to the institution itself, to regulate its entire radioisotope usage. Separate licenses are not normally granted to the various departments or to individuals at that institution

The primary purpose of a buffer is to control the pH of the solu￾tion. Buffers can also play secondary roles in a system, such as controlling ionic strength or solvating species, perhaps even affect￾ing protein or nucleic acid structure or activity. Buffers are used to stabilize nucleic acids, nucleic acid–protein complexes, proteins

Culture is thought to be the thing only humans have. Studies of animals however, show that chimpanzees can make and use tools like man. Monkeys can learn to do something from each other. Apes can even be taught some forms of language. We find that certain animals do culture similar to that of human beings and the line dividing us from them is not as clear as we used to think

I. Summary of the Text Beijing,may5,1998 Intel announces that it will invest US$50 0 million to open an information technology research and development center in Beijing, China The Intel China Research Center will explore Internet-related issue and information technology disciplines. It will improve the fundamental research level in high technology in China and promote the exchange and cooperation between

Culture means an entire way of life of a society, or of a people. Different cultures have their own patterns of life. It's rather than instinctive behavior. The diversity of culture shows different attitude to ideas of what is beautiful and ways to treat dead bod ies. But it has nothing to do with right or wrong, for it is simply that different people do the some things in different ways

The bermuda triangle L. Introduction 1. Introductory Remarks The Bermuda Triangle. also called the Devils Triangle is an area of the Atlantic Ocean off southeast Florida, where the disappearance of ships and airplanes on a number of occasions has led to considerable interest in unexplainable losses and other

I.Introduction 1. Introductory Remarks Are there any sounds we cannot hear? Yes But does it mean there is something wrong with our hearing? As a matter of fact, most of us can only hear the sound vibrations that occur within the range of 20 times per second to 20 000 times per second. Those below

Today's modern communication technology is quite advanced. It is optical fibers and lasers, together with the striking improvements in computing that have made such remarkable communication possible. By using the telephone-line with expanded capacity, people can send messages not only in the form of sound but also in written words graphs and even moving pictures on the Internet

Theoretically speaking, the early-airport arrivals should be rewarded while the late airport ones should be punished. But this usually isnt the case. And there are such people who pay off their taxi only just before boarding, but still get their luggage first when landing. To my great embarrassment, early as I arrived, I

Keys (02级水平测试卷) 1~35(每题1分) CCABD BBACD CBDDB ACADB BDDAB ABBCD CBCDA 36~39CACB(每题得分2.5分) ADDD(每题得分1.5分) BCAA(每题得分1分) DBBC(每题得分0分)