对于可逆反应:aA(g)+bB(g)mC(g)+ nD(g);△H

题型:选择题

问题:

对于可逆反应:aA(g)+bB(g)mC(g)+  nD(g);△H<0,下列说法正确的是

A.浓度改变平衡必移动

B.增大压强平衡必移动

C.升高温度平衡必移动

D.导入氦气平衡必移动

考点:影响化学反应速率的因素
题型:选择题

下列地层中不易发生滑坡的是( )。

A.(A) 第四系黏性土与黄土

B.(B) 页岩、片岩等软弱岩石

C.(C) 泥质岩的变质岩系

D.(D) 不易风化的凝灰岩

题型:选择题

下列各控件不包含滚动条的控件是( )。

A.ListBox

B.ComboBox

C.TextBox

D.LabelBox

题型:选择题

Some researchers claim that people’s personalities can be classified by their blood types.If you have blood type O, you are a leader.When you see something you want, you strive to achieve your goal.You are passionate, loyal, and self-confident, and you are often a trendsetter.Your enthusiasm for projects and goals spreads to others who happily follow your lead.When you want something, you may be ruthless about getting it or blind to how your actions affect others.Another blood type, A, is a social “people” person.You like people and work well with them.You are sensitive, patient, compassionate, and affectionate.You are a good peacekeeper because you want everybody to be happy.In a team situation, you resolve conflicts and keep things on a smooth course.Sometimes type As are stubborn and find it different to relax.They may also find it uncomfortable to do things alone.

People with type B blood are usually individualists who like to do things on their own.You may be creative and adaptable, and you usually say exactly what you mean.Also you can adapt to situations, you may not choose to do so because of your strong independent streak.You may prefer working on your own to being part of a team.The final blood type is type AB.If you have AB blood, you are a natural entertainer.You draw people to you because of your charm and easygoing nature.ABs are usually calm and controlled, tactful and fair.On the downside, though, they may take too long to make decisions.And they may procrastinate, putting off tasks until the last minute.

小题1:.People with type O will do the following things except____.

A.manage businesses

B.self-oriented

C.be considerate

D.set the fashion小题2:.Which of the following is not the feature of type A?

A.Stubborn.

B.Sensitive.

C.Reserved.

D.Patient.小题3:.What is Not true to type B?

A.He finds it uncomfortable to do things alone.

B.He doesn’t think much before he speaks.

C.He has many original ideas.

D.He cannot fit in with the environment.小题4:.The best profession for a type AB is ____.

A.Athlete

B.Peacekeeper

C.Actor

D.Country leader

题型:选择题

阅读以下文字,完成题。
近几年,通信技术网络的超高速化,已成为世界上的发展潮流。空间技术与计算机融合成跨越时间与空间的信息基础结构,它将逐渐深入千家万户,从根本上改变人们的生产、生活和相互交往的方式,加速人类文明和文化的传播,增进相互理解和全球意识。
空间信息的高速公路,这一名词是借鉴信息高速公路概念,也是信息高速公路的拓宽与延伸。所谓空间信息高速公路,我们可以形象地将它理解为以卫星、光纤再辅之以其他通信手段作为“公路”,而以集电脑、电话、传真等为一体的多媒体作为“汽车”,使信息高速传递并能共享的通信网络。这种网络遍布全国乃至全球。在我国则将它称之为国家经济信息化基础设施,其内涵包括4项要素:网络与通信、计算机与信息化设备、信息资源与服务、人与信息化环境。
卫星通信和数字网络光缆就像高速公路一样,是促进社会经济发展的基础设施。它不仅包括地面光缆数字通信网络系统,而且还包括通信卫星、卫星定位系统和环境、灾害监测技术系统。此外.还有不断更新的社会、经济统计数据库和自然资源数据系列,以及宏观调控、规则决策和工程设计服务及知识库,逻辑推理机等人工专家系统,这样,才能有效地实现以信息交流代替人流、物流与能量流。
加速发展空间技术,多方面、高效率利用空间技术,特别是充分利用空间信息资源,促进社会生产力的发展,已成为当今世界的共识。通信卫星具有通信容量大、可靠性高、传输距离远、不受地理环境影响等许多优点,所以备受各国的重视和欢迎。在空间信息高速公路中,卫星无线电信频率宽,极容易实现双向高速率的数据和可视电信业务。并适用于单向多路的电视节目以及新闻报道,对大多数用户都有实用价值。对发展中国家来说,空间信息高速公路的建设,可弥补通信基础设施差与区域性通信空缺之不足。例如,地面信息高速公路的成本昂贵,需要10~15年甚至更长时间才能建成,是一个无法在短期内普及服务的巨额投资项目,而卫星接收设备费用大约只需200美元,其技术是现成的,是一个在短期内能普及并能满足绝大多数用户需求的业务项目。

第一段“它将逐步深入千家万户”与第三段“它不仅包括地面光缆数字通信网络系统”两句中的“它”,各指的是( )。

A.都是指空间信息高速公路

B.都是指卫星通信和数字网络光缆

C.前一个“它”指空间信息高速公路,后一个“它”指卫星通信和数字网络光缆

D.前一个“它”指空间技术与计算机融合成跨越时间与空间的信息基础结构,后一个“它”指空间信息高速公路

题型:选择题

民国初平女子发式流行()。

A、一字头、刘海头、长辫

B、烫发

C、披肩发

D、短发

更多题库