题目内容

水泥抗压强度试验，以一组三个试件得到的6个抗压强度算术平均值为试验结果。如 6个测定值中有一个超出6个平均值的±15%，舍去该结果，而以剩下5个的平均数为结果，如5个测定值中再有超过5个结果平均数的土15%，则该次试验结果作废。()

A. 正确
B. 错误

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A. 正确
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A. 正确
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听力原文： Today I'd like to mention an interesting television program that will be shown on October 10th. It's about the brain. It's a new public television show produced in New York City. The program will investigate how the brain functioned and new functions. Some interesting topics that will be discussed are dreaming, memory, and depression. These topics will be illustrated by using computer imitations of the brain to make explanation easy to follow. The show is not for children. But don't worry. It's not intended for scientists either. I think the program will be very helpful with the work we're doing in class on the brain. I hope you'll watch it. Remember it's on October 10th.
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A computer specialist.
B. A scientist.
C. A television announcer.
D. A teacher.