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A1C会计师事务所于2006年6月份成立，为了保证审计质量，防范执业风险，正在制定审计质量控制政策和程序。针对ABC会计师事务所在制定规程时遇到的以下问题，请按照《会计师事务所质晕控制准则》的相关要求，提供正确的意见。
鉴证业务的工作底稿包括历史财务信息审计和审阅业务，其他鉴证业务，其工作底稿的归档期限为业务报告后的90天。()
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When the AIDS virus attacks our defense system, ______.
But weight is not the only factor. The smaller the computer the faster it can work. The signals go to and fro at a very high but almost constant speed. So if one can scale down all dimensions to, let us say, one tenth, the average lengths of the current-paths will be reduced to one tenth. So, very roughly speaking, scaling down of all linear dimensions in the ratio of one to ten also gives a valuable bonus: the speed of operation is scaled up 10 times. Other techniques allow even further speed increases.
This increase of operation is a real advantage. There are some applications in which computers could be used which require very fast response times. Many of these are military, of course; but military applications also have applications in engineering sooner or later. For example, automatic blind landing of aircraft requires continuous computer calculations which result in control of the aircraft flight. The more immediate the responses are, the more stable that control can be.
Another advantage is that less power is required to run the computer. In space vehicles and satellites this is an important matter; but even in a trial application we need not waste power. Sometimes a computer takes so much power that cooling systems which require still more power have to be installed to keep the computer from getting too hot, which would increase the risk of faults developing. So a computer which does not need to be cooled saves power on two counts.
Another advantage is reliability. Mini-computers have been made possible by the development of integrated circuits. Instead of soldering bits of wire to join separate components such as resistors and capacitors sometimes in the most intricate networks, designers can now produce many connected circuits in one unit which involves no soldering and therefore no risk of broken joints at all.
Which of the following is NOT one of the advantages of mini-computers？
Part A
Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. (40 points)
More than a hundred years ago, before the Civil War, a crew of cowboys stood outside a large horse corral. With them was their boss Bradford Grimes, a cattleman, who owned a large South Texas ranch near the Gulf of Mexico.
Just then, Mrs. Grimes, the cattleman's wife, came to the ranch house door and cried out, "Bradford! Bradford! Those Blacks are worth a thousand dollars apiece. One might get killed". The cowboys laughed, but they knew she was telling the truth. For they were all Black slaves. Bradford Grimes was their owner.
Most of the first Black cowboys were slaves, brought by their masters from the old South. On the plantations in the South, the slaves cut cotton. On the ranches in Texas they had to learn a new trade—breaking horses and handling long-horns. Some were taught by Mexican vaqueros, some by Indiana who knew the ways of horses and cattle.
Grimes was only one of hundreds of slave-owning ranchers who ran cattle in Texas. The ranchers had brought their families and slaves from Mississippi, Georgia, and other southern states. They came on horseback, on foot, and in wagons.
Some ranchers settled near the Mexican border, but there they found that it was too easy for their slaves to escape. Even slaves as far north as Austin, the capital of Texas, came to think of Mexico as the Promised Land. As early as 1845, the year that Texas became a state, a Texas newspaper reported the escape of twenty-five Blacks. "They were mounted on some of the best horses that could be found, "the story said, "and several of them were well armed". Thousands of other Black slaves escaped in the same way.
All-Black cattle crews were common throughout central and eastern Texas. There were even a few free Blacks who owned ranches before the Civil War. Aaron Ashworth was one of them, and he owned 2,500 cattle, as well as some slaves of his own. He employed a White schoolmaster to tutor his children. Black cowboys helped to tame and settle a wild country.
Most of the first Black slaves that became cowboys ______.
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