题目内容
In the author's opinion, the major cause of many people to make U-turns is that ______.
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将发运凭证与相关的销售发票和主营业务收入明细账及应收账款明细账中的分录进行核对是注册会计师检查所有销货业务已登计人账常用的交易实质性程序。()
以下程序中函数scmp的功能是返回形参指针s1和s2所指字符串中较小字符串的首地址。 #include＜string＞ char*scmp(char*s1,char*s2) { if(strcmp(s1,s2)＜0) return(s1)； else retrun(s2)； } main() { int i；char string[20],str[3][20]； for(i=0；i＜3；i+
金属表面无可见的油脂和污垢，并且没有附着不牢的氧化皮、铁锈和油漆涂层等，此时的预处理质量等级为()。
Myers is the founder of Auburn University's Institute for Biological Detection Systems, the main task of which is to chase the ultimate in detection devices--an artificial nose.
For now, the subject of their research is little more than a stack of gleaming chips tucked away in a laboratory drawer. But soon, such a tool could be hanging from the belts of police, arson(纵火)investigators and food-safety inspectors.
The technology that they are working on would suggest quite reasonable that, within three to five years, we'll have some workable sensors ready to use. Such devices might find wide use in places that attract terrorists. Police could detect drugs, bodies and bombs hidden in cars, while food inspectors could easily test food and water for contamination.
The implications for revolutionary advances in public safety and the food industry are astonishing. But so, too, are the possibilities for abuse: Such machines could determine whether a woman is ovulating(排卵), without a physical exam--or even her knowledge,
One of the traditional protectors of American liberty is that it has been impossible to search everyone. That's getting not to be the case.
Artificial biosensors created at Auburn work totally differently from anything ever seen before. AromaScan, for example, is a desktop machine based on a bank of chips sensitive to specific chemicals that evaporate into the air. As air is sucked into the machine, chemicals pass over the sensor surfaces and produce changes in the electrical current flowing through them. Those current changes are logged into a computer that sorts our odors based on their electrical signatures.
Myers says they expect to load a single fingernail-size chip with thousands of odor receptors (感受器), enough to create a sensor that's nearly as sensitive as a dog's nose.
The artificial nose can be used to detect drugs and water contamination.
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