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问题 单项选择题

船舶离泊计划通常应包括：（）.Ⅰ开航前的准备Ⅱ离泊操纵总体安排Ⅲ离泊操纵中可能遇到的问题和对策Ⅳ港内航道航行操纵

A.Ⅰ、Ⅱ

B.Ⅰ、Ⅲ、Ⅳ

C.Ⅱ～Ⅳ

D.Ⅰ～Ⅳ

答案

参考答案：D

单项选择题

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 (91) . As was discussed before, it was not (92) the 19th century that the newspaper became the dominant pree-leetronie (93) , following in the wake of the pamphlet and the book and in the (94) of the periodical. It was during the same time that the communications revolution (95) up, beginning with transport, the railway, and leading (96) through the telegraph, the telephone, radio, and motion pictures (97) the 20th-eentury world of the motor ear and the airplane. Not everyone sees that process in (98) . It is important to do so.
It is generally recognized, (99) , that the introduction of the computer in the early 20th century, (100) by the invention of the integrated circuit during the 1960s, radically changed the process, (101) its impact on the media was not immediately (102) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (103) , with display becoming sharper and storage (104) increasing. They were thought of, like people, (105) generations, with the distance between generations much (106)
It was within the computer age that the term" information society" began to be widely used to describe the (107) within which we now live. The communications revolution has (108) both work and leisure and how we think and feel both about place and time, but there have been (109) views about its economic, political, social and cultural implications. "Benefits" have been weighed (110) "harmful" outcomes. And generalizations have proved difficult.

A．brought

B．followed

C．stimulated

D．characterized
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多项选择题

当工件以（）为定位基准时，采用一面两孔定位。

A.两个轴线相互平行的孔

B.两个轴线相互垂直的孔

C.与孔平行的平面

D.与孔垂直的平面

E.一面与两孔等距

F.一面与两孔对称
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