活动型芯
参考答案:
用来成型与开模方向不同的侧孔(凹)或凸台的零件,借助于抽芯机构,能实现位移以完成抽芯、复位动作的可活动型芯,称为活动型芯。
以下文字是摘自近代某历史人物自传序言:“余与陆子兴(徵祥)外长,权衡利害,折冲樽俎,虽未全部承认,终屈于日本之最后通牒。……其后巴黎和会失败,亦归咎于我;于是群起而攻,掀起五四风潮,指我为卖国贼,然而事实经过,何尝如此!徒以三人成虎,世不加察,以致恶性宣传,俨如铁案,甚矣,积非成是之可惧也r我们可以得出的正确结论有
A.由于谣言作者被冤枉
B.在对日交涉中作者并未卖国
C.文中“最后通牒”所涉条约为巴黎和会《凡尔赛和约》
D.此书可能是曹汝霖或章宗祥所著
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.context
B.range
C.scope
D.territory