¡¡¡¡which can quickly analyze the chemical elements in almost any substance without destroying it£¬ is
¡¡¡¡finding uses in medicine£¬ archaeology£¬ and criminology.
¡¡¡¡£¨A£© Originally developed for detecting air pollutants£¬ a technique called proton-induced x-ray
¡¡¡¡emission£¬ which can quickly analyze the chemical elements in almost any substance without
¡¡¡¡destroying it£¬
¡¡¡¡£¨B£© Originally developed for detecting air pollutants£¬ having the ability to analyze the chemical
¡¡¡¡elements in almost any substance without destroying it£¬ a technique called proton induced x-ray emission
¡¡¡¡£¨C£© A technique originally developed for detecting air pollutants£¬ called proton-induced x-ray
¡¡¡¡emission£¬ which can quickly analyze the chemical elements in almost any substance without destroying it£¬
¡¡¡¡£¨D£© A technique originally developed for detecting air pollutants£¬ called proton-induced x-ray
¡¡¡¡emission£¬ which has the ability to analyze the chemical elements in almost any substance
¡¡¡¡quickly and without destroying it£¬
¡¡¡¡£¨E£© A technique that was originally developed for detecting air pollutants and has the ability to
¡¡¡¡analyze the chemical elements in almost any substance quickly and without destroying the
¡¡¡¡substance£¬ called proton-induced x-ray emission£¬
¡¡¡¡2. None of the attempts to specify the causes of crime explains why most of the people exposed to the
¡¡¡¡alleged causes do not commit crimes and£¬ conversely£¬ why so many of those not so exposed have.
¡¡¡¡£¨A£© have
¡¡¡¡£¨B£© has
¡¡¡¡£¨C£© shall
¡¡¡¡£¨D£© do
¡¡¡¡£¨E£© could
¡¡¡¡3. Computers are becoming faster£¬ more powerful£¬ and more reliable£¬ and so too are modems£¬ they are
¡¡¡¡the devices to allow two or more computers to share information over regular telephone lines.
¡¡¡¡£¨A£© so too are modems£¬ they are the devices to allow
¡¡¡¡£¨B£© so too are modems£¬ the devices that allow
¡¡¡¡£¨C£© so too modems£¬ the devices allowing
¡¡¡¡£¨D£© also modems£¬ they are the devices that allow
¡¡¡¡£¨E£© also modems£¬ which are the devices to allow
¡¡¡¡4. A 1972 agreement between Canada and the United States reduced the amount of phosphates that
¡¡¡¡municipalities had been allowed to dump into the Great Lakes.
¡¡¡¡£¨A£© reduced the amount of phosphates that municipalities had been allowed to dump
¡¡¡¡£¨B£© reduced the phosphate amount that municipalities had been dumping
¡¡¡¡£¨C£© reduces the phosphate amount municipalities have been allowed to dump
¡¡¡¡£¨D£© reduced the amount of phosphates that municipalities are allowed to dump
¡¡¡¡£¨E£© reduces the amount of phosphates allowed for dumping by municipalities
¡¡
