问题 判断题

某灰土层7天强度标准为0.80MPa,抽样检测时得到的强度平均值为0.85MPa,尽管如此,强度也可能不合格。()

答案

参考答案:

解析:

评定路段试样的平均强度应满足下式的要求:

,式中:Rd—设计抗压强度(MPa);Cv—试验结果的偏差系数(以小数计);乙一标准正态分布表中随保证率而变的系数,高速公路、一级公路,保证率95%,Za=1.645;其他公路,保证率90%,Za= 1.282。路段内无机结合料稳定材料强度的评定:评为合格时得满分,不合格时得零分。

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Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.

It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .

It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

(63)是()

A.gathered

B.speeded

C.worked

D.picked