【多选题】【消耗次数:1】
电子政务的类型包括( )
G2G
G2C
G2B
G2D
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相关题目
【单选题】 已知反应A2(g)+2B2(g) 2AB2(g)△H <0,下列说法正确的
①  升高温度,正向反应速率增加,逆向反应速率减小
②  升高温度有利于反应速率增加,从而缩短达到平衡的时间
③  达到平衡后,升高温度或增大压强都有利于该反应平衡正向移动
④  达到平衡后,降低温度或减小压强都有利于该反应平衡正向移动
【单选题】 一定条件下反应2AB(g) A2(g)+B2(g)达到平衡状态的标志是
①  单位时间内生成nmolA2,同时消耗2n molAB
②  容器内,3种气体AB、A2、B2共存
③  AB的消耗速率等于A2的消耗速率
④  容器中各组分的体积分数不随时间变化
【单选题】 设 G 是 n (n 3 2)阶无向简单图,?G 是它的补图. 已知 G的最大度?(G) = k1, 最小度d (G) = k2, 则其补图?G以下哪个性质不对:
①  对每个顶点 v, 有 dG(v) + d?G (v) = n - 1;
②  ?(?G) = (n - 1) - k2;
③  对每个顶点 v, 有 dG(v) + d?G (v) = n;
④  d (?G) = (n - 1) - k1。
【多选题】 对反应N2(g)+3H2(g)≒ 2NH3(g)+Q,提高氢气转化率的方法是
①  升温
②  降温
③  增加压力
④  增加N2(g)的量
【判断题】 f(x)=x,g(x)=(√2)^2 ;f(x)=g(x)
①  正确
②  错误
【单选题】 已知下列三个热化学方程式 ①C(s)+H2O(g)=CO(g)+H2(g) △H=+131.5kJ/mol ②1/2H2(g)+1/2Cl2(g)=HCl(g) △H=-92.3kJ/mol ③ H2(g)+1/2O2(g)=H2O(g) △H=-241.8kJ/mol 则以上三个反应的反应热大小关系正确的是
①  ①>②>③
②  ③>②>①
③  ③>①>②
④  ①>③>②
【单选题】 反应:2NH3(g)≒N2(g)+3H2(g),在某温度下的平衡常数为0.25,则在此温度下反应 N2(g)+ H2(g)≒NH3(g)的平衡常数为
①  4
②  0.5
③  2.0
④  0.25
【判断题】 f(x)=lnx^2,g(x)=2lnx;f(x)=g(x)
①  正确
②  错误
【判断题】 若G1同构于G2, 则G1与G2有相同的顶点数和边数。
①  正确
②  错误
【单选题】 设U={a,b,c,d,e,f,g},A={a,c,e,g}则Cu(A)=( )
①  {b,d,f}
②  {b,d,g}
③  {b,d,f,g}
④  {d,f,g}
【单选题】 称取“2g”,指
①  称取重量可为1.5~2.5g
②  称取重量可为1.995~2.005g
③  称取重量可为1.75~2.25g
④  称取重量可为1.9995~2.0005g
⑤  称取重量可为1.95~2.05g
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【单选题】 Let’s make it round 9 o’clock.____________
①  No. I think so.
②  I am proud of you!
③  It’s impossible.
④  Would some time later be convenient?
【单选题】 After driving for thirty miles, she suddenly realized that she ()in the wrong direction.
①  was driving
②  has been driving
③  had been driving
④  drove
【单选题】 I am not sure whether I can gain any profit from the investment, so I can’t make a(n) ____ tohelp you.
①  exact
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③  definite
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【单选题】 It was a(n) _______ achievement ― no one has ever won the championship five times before.
①  single
②  unique
③  only
④  sole
【单选题】 There are many children()behaviour is generally unacceptable.
①  who
②  whom
③  whose
④  that
【单选题】 Happy New Year to you. ____________
①  The same to you.
②  Yes, I am happy.
③  What about you.
④  Very well, thanks.
【单选题】 She was so _____ in her job that she didn’t hear someone knocking at the door.
①  attracted
②  drawn
③  absorbed
④  concentrated
【单选题】 A good public speaker can _______ the audience (听众)at the very beginning.
①  convey
②  portray
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【单选题】 How was your trip to London, Jane?________
①  Oh, wonderful indeed.
②  I went there alone.
③  The guide showed me the way.
④  By plane and by bus.
【单选题】 Every means _______ been tried to solve the difficult problem.
①  has
②  have
③  is
④  are