{{B}}Text{{/B}} 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 {{U}} 26 {{/U}} . As was discussed before, it was not {{U}} (27) {{/U}} the 19th century that the newspaper became the dominant pre-electronic {{U}} (28) {{/U}} , following in the wake of the pamphlet and the book and in the {{U}} (29) {{/U}} of the periodical. It was during the same time that the communications revolution {{U}} (30) {{/U}} up, beginning with transport, the railway, and leading {{U}} (31) {{/U}} through the telegraph, the telephone, radio, and motion pictures {{U}} (32) {{/U}} the 20th-century world of the motor car and the air plane. Not everyone sees that process in {{U}} (33) {{/U}} . It is important t A. concept B. dimension C. effect D. perspective [单项选择]高位油箱是离心式压缩机组安全保护的设施之一,一旦发生停电故障,辅助油泵又不能及时启动供油时,则高位油箱的润滑油将沿进油管路流经各轴承后返回油管。所以,高位油箱应布置在距机组轴心线不小于()m的高度之上。
A. 2 B. 3 C. 4 D. 5 [单选题]公路通行能力是公路所能疏导( )的能力,反映保持规定的运行质量前提下,公路所能通行的最大小时交通量。
A.交通量 B.交通流 C.客车 D.货车 [单项选择]终末血尿伴尿频、尿急、尿痛,常见于()
A. 肾结核 B. 肾肿瘤 C. 肾结石 D. 肾盂肾炎 E. 慢性肾炎 [单选题]BL008《HSE作业指导书》的内容通常应具有安全性、科学性、( )。
A.统一性 B.完整性 C.可操作性 D.指导性 ; [判断题] ( )液体静压轴承的外圆与轴承壳体内孔的配合应保证一定的过盈量。
A.正确 B.错误 [单项选择]钩体病患者后期出现脑动脉炎的机制是由于()
A. 变态反应 B. 赫氏反应 C. 钩体对组织器官的直接损害 D. 过敏反应 E. 钩体败血症 [单项选择]设函数f(u)可导,y=f(x3)当自变量x在x=-1处取得增量△x=-0.1时,相应的函数增量△y的线性主部为0.1,则f'(1)=______.
A. -1 B. 0.1 C. 1 D. 0.5 [单选题]单个计量箱应()通知、()送电,核对户表关系正确,确保对客户供电正常。
A.批量、逐户 B.逐户、批量 C.逐户、逐户 D.批量、批量 [单选题]关于红外精确测温说法不正确的是(____)。
A.风速一般不大于0.5m/s B.检测期间天气为晴天 C.避开强电磁场,防止强电磁场影响红外热像仪的正常工作 D.被检测设备周围应具有均衡的背景辐射,应尽量避开附近热辐射源的干扰,某些设备被检测时还应避开人体热源等的红外辐射。 我来回答: 提交
|