某种规格的绝缘材料，规定其击穿电压不低于1200V，已知样本均值x＝4000V，样本标准差s＝1000V，则该工序的过程能力指数CpL约为( )．
A．0.9973
B．0.9545
C．0.6827
D．0.93
[单选题]听力原文： It is a great privilege for me to be invited to speak at the tenth year reunion of State University' s graduating class. When you arrived on campus today, after a decade, you were probably impressed by two changes at State:one, the absence of
[单选题]听力原文： Now European finance ministers are expected to reprimand the Irish government today after they meet in Brussels. They've been alarmed by December's budget in the Irish Republic which cut taxes and increased government spending. The other Euro
[填空题] 磨机浆液循环箱尺寸Φ3000×2800mm；有效容积（）m3。
[单选题]听力原文：M: Well, madam, the first and the most important thing I have to tell you is that there is really nothing seriously wrong with you, physically that is. The analyst' s report shows that basically you are very fit.W: So, why is it that I' m alwa
[单选题]听力原文：M: We are having a little party at the weekend. Can you and Tom come?W: That sounds nice. Thank you. But I'll have to check with Tom. I'll tell you tomorrow.Will the woman come to the party?A．Maybe.B．Yes, she will.C．Yes, certainly.D．No, she wi
[单选题]听力原文： Some people dream of being President of the United States. Some dream of becoming stars in a Hollywood movie, and others of making millions of dollars overnight. But, could a dream like that come true in real life? Well, it did happen to Peter
[单选题]听力原文：W: How are you getting on with your experiment?M: In spite of my continuous failure, I have already made some progress.What can we learn about the man's enperiment ?A．It is going on well.B．It has failed several times.C．It will soon be finished.
[单选题]听力原文： (32)Your assignments this term will be to write two major research papers．One of the most important things about writing a research paper is giving proper credit of your resources of information. Failure to do this is called plagiarism which is
[单选题]听力原文： [29] Moving away from newspapers, let's now focus on magazines. Now the first magazine was a little periodical called The Review, and it was started in London in 1704. It looked a lot like the newspapers of the time. But in terms of its conten