[判断题]燃煤锅炉烟气中的NOx主要以NO形式存在.
[单选题]是( )A.酸性载体B.两性载体C.中性载体 D.碱性载体
[单选题]有关楼梯的净空高度设计,下列叙述不正确的是 A.有关楼梯的净空高度设计,下列叙述不正确的是 B.楼梯平台上部及下部过道处的净高不应小于2.00m C. 梯段净高不应小于2.20m D. 贮藏室、局部夹层、走道及房间的最低处的净高不应小于2.0m
[填空题]属国家行政机关法定公文文种的是
[判断题]作为直流电动机运行时,由于电源为直流,转子导体中的电流也为直流.
[名词解释]早产
[单选题]SQL语言中的C.MMIT语句的主要作用是( ).A. 结束程序B. 返回系统C. 提交事务D. 存储数据
[计算题]某一服从p(V-b) = RT状态方程的气体(b是常数),再从1000b等温可逆膨胀至2000b,所做的功应是理想气体经过相同过程所做功的多少倍(结果保留整数)
[判断题]双作用式叶片马达与相应的泵结构不完全相同.
[问答题]列举五项地基基础设计等级为甲级的地基
[单选题]二元理想稀溶液,其溶质和溶剂分别遵守 A.Henry规则和Lewis--Randll规则B.Lewis--Randll规则和Henry规则C.拉乌尔规则和Lewis--Randll规则D.Lewis--Randll规则和拉乌尔规则
[单选题]下列关于转速反馈闭环调速系统反馈控制基本规律的叙述中,错误的是( ).A 只用比例放大器的反馈控制系统,其被调量仍是有静差的B 反馈控制系统可以抑制不被反馈环节包围的前向通道上的扰动C 反馈控制系统的作用是:抵抗扰动、服从给定D 系统的精度依赖于给定和反馈检测的精度
[问答题]环境心理学家的主要学术根源有
[单选题]对燃烧灰分很大的煤,锅炉设计时,省煤器烟气流速的选择需考虑到( )A、最高烟气流速受到磨损条件限制,最低烟气流速受到积灰条件限制B、最高烟气流速受到流动阻力条件限制,最低烟气流速受到传热条件限制C、最高烟气流速受到积灰条件限制,最低烟气流速受到磨损条件限制D、最高烟气流速受到传热条件限制,最低烟气流速受到流动阻力条件限制
[阅读理解]Amtrak (美国铁路客运公司)was experiencing a downswing in ridership (客运量)along the lines comprising its rail system. Of major concern to Amtrak and its advertising agency DDB Needham, were the long-distance western routes where ridership had been declining significantly. ]At one time, trains were the only practical way to cross the vast areas of the west. Trains were fast, very luxurious, and quite convenient compared to other forms of transportation existing at the time. However, times change and the automobile became America‘s standard of convenience. Also, air travel had easily established itself as the fastest method of traveling great distances. Therefore, the task for DDB Needham was to encourage consumers to consider other aspects of train travel in order to change their attitudes and increase the likelihood that trains would be considered for travel in the west. Two portions of the total market were targeted:1)anxious fliers―those concerned with safety, relaxation, and cleanliness and 2)travel-lovers―those viewing themselves as relaxed, casual, and interested in the travel experience as part of their vacation. The agency then developed a campaign that focused on travel experiences such as freedom, escape, relaxation, and enjoyment of the great western outdoors. It stressed experiences gained by using the trains and portrayed western train trips as wonderful adventures. Advertisements showed pictures of the beautiful scenery that could be enjoyed along some of the more famous western routes and emphasized the romantic names of some of these trains (Empire Builder, etc. ). These ads were strategically placed among family-oriented TV shows and programs involving nature and America in order to most effectively reach target audiences. Results were impressive. The Empire Builder, which was focused on in one ad, enjoyed a 15 percent increase in profits on its Chicago to Seattle route. 1.What‘s the author‘s purpose in writing this passage? 【外语教育&网www.for68.com】 A) To show the inability of trains to compete with planes with respect to speed and convenience. B) To stress the influence of the automobile on America‘s standard of convenience. C) To emphasize the function of travel agencies in market promotion. D) To illustrate the important role of persuasive communication in changing consumer attitudes. 2.It can be inferred from the passage that the drop in Amtrak ridership was due to the fact that ________. A) trains were not suitable for short distance passenger transportation B) trains were not the fastest and most convenient form of transportation C) trains were not as fast and convenient as they used to be D) trains could not compete with planes in terms of luxury and convenience3.To encourage consumers to travel by train, DDB Needham emphasized ________.A) the freedom and convenience provided on trainsB) the practical aspects of train travelC) the adventurous aspects of train tripsD) the safety and cleanliness of train trips 4.The train ads were placed among family-oriented TV programs involving nature and America because ________.A) they could focus on meaningful travel experiencesB) they could increase the effectiveness of the TV programsC) their profits could be increased by some 15 percentD) most travel-lovers and nervous fliers were believed to be among the audiences5.According to the passage, the Empire Builder enjoyed an increase in ridership and profits because ________.A) the attractiveness of its name and route was effectively advertisedB) it provided an exciting travel experienceC) its passengers could enjoy the great western outdoorsD) it was widely advertised in newspapers and magazines in Chicago and Seattle
[多选题]MOTOMA. 机器人 NX100 控制柜上的动作模式有( ).A.示教模式 B.急停模式 C.再现模式 D.远程模式
[单选题]屋面防水等级按GB.0207-2002 规定划分为Ⅰ~Ⅳ级,其中Ⅰ级防水为( )年.A.25B.15C.10D.5
[判断题]数据通信是通信技术和计算机技术相结合而产生的一种新的通信方式.
[判断题]在渲染操作中,所有的光源,都可以自动产生阴影效果
[单选题]下列方法中不能去除悬浮物的是( )A. 絮凝B. 澄清C. 过滤D. 吸附
[多选题]配制混凝土时,水灰比过大,则混凝土( ) A.拌合物的保水性变差B.拌合物的粘聚性变 C.耐久性下降D.强度提高