27 下列指标可用于考核邮件准确性的是( )。
A．邮件延误率
B．邮件错收率
C．邮件损失率
D．邮件短缺率
参考答案：B
解析： “准确”的要求是指信息或实物邮件的传递要按用户委托的要求准确地投交收件人，在信息和实物的传递过程中要保持信息的原有内容不失真、不走样，实物邮件要完好无损。要用相应的差错率指标来考核邮件传递过程中的准确程度。
There was a blacksmith(铁匠) who wasn't satisfied with his work. Once he complained, “I am not well and my work is too warm. I want to be a ____小题1:____ on the mountain. There it must be _____小题2:____, for the wind blows and the trees give a shade..” A wise man who had ___小题3:____ over all things replied, “Go you, be a stone.” And he was a stone, high up on the ____小题4:____ side. It happened that a stone-cutter ____小题5:____ that way for a stone and when he saw the one that had been the ____小题6:____, he knew that it was what he ____小题7:_____ and he began to cut it. The stone ____小题8:____ out, “This hurts! I no longer want to be a stone. A stone-cutter I want to be. That ____小题9:____ be pleasant.” The wise man, humoring him, said, “Be a cutter.” ____小题10:____ he became a stone-cutter and as he went seeking a suitable stone, he ____小题11:____ tired and his feet were sore（酸痛）. He ____小题12:____,” I no longer want to cut stone. I would be the sun; that would be pleasant.” The wise man ___小题13:___, “Be the sun.” And he was the sun. But the sun was warmer than the blacksmith, than a stone, than a stone-cutter, and he complained, “I do not ____小题14:___ this. I would be the moon. It ___小题15:____ cool.” The wise man spoke yet again, “Be the moon.” And he was the moon. This is warmer than being the sun,” ____小题16:___ he, “for the light from the sun ____小题17:____on me ever. I do not want to be the moon. I would be a ___小题18:____ again. That, indeed, is the ___小题19:____ life.” But the wise man replied, “I am ____小题20:___of your changing. You wanted to be the moon; the moon you are and you will remain.”
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