补全对话

— Sit down, please, take it easy. What's your name, please?

—  Alice.

—      1    .

— My house was broken into last night.

— Can you describe what happened last night?

— Yes. At 6, my husband and I left home to attend a friend's birthday party.      2   .  When I opened

      the door, we found that someone had entered our house by the window.

—       3     .

— Yes. My diamond necklace is gone,     4     .

— Can you tell me anything more?

— The man living opposite our house said he had heard a sound of glass being broken at about 11. After

      a while, he saw a tall man with long hair come out of my house.

— Well,     5     . If we have any news, we'll let you know.

A. Have you got anything stolen?

B. we'll look into the case right away.

C. What's the matter, Madam?

D. Do worry too much about such a case.  

E. so are my computer and two valuable vases.

F. We didn't get home until midnight.

G. We are sure to find out the thief.

Ⅰ．由于温室效应和资源短缺等问题，如何降低大气中的CO₂含量并加以开发利用，引起了各国的普遍重视．目前工业上有一种方

法是用CO₂生产燃料甲醇．一定条件下发生反应：CO₂（g）+3H₂（g）

CH₃OH（g）+H₂O（g），如右上图表示该反应进行过程中能量（单位为kJ•mol^-1）的变化．

（1）为探究反应原理，现进行如下实验：T₁℃时，在体积为1L的密闭容器中，充入1mol CO₂和3mol H₂，测得CO₂和CH₃OH（g）的浓度随时间变化如右下图所示．从反应开始到平衡，用氢气浓度变化表示的平均反应速率v（H₂）=______mol•L^-1•min^-1．

（2）该反应平衡常数K的表达式为______．

（3）温度变为T₂℃（T₁＞T₂），平衡常数K______（填“增大”、“不变”或“减小”）．

（4）不能判断该反应是否达到化学平衡状态的依据是______．

A．容器中压强不变        B．混合气体中  c（CO₂）不变

C．v_正（H₂）=v_逆（H₂O）    D．c（CO₂）=c（CO）

（5）下列措施中能使n（CH₃OH）/n（CO₂）增大的有______．

A．升高温度；      B．加入催化剂；    C．将H₂O（g）从体系中分离；

D．再充入1molCO₂和3molH₂；   E．充入He（g），使体系总压强增大．

Ⅱ．在温度t℃下，某NaOH的稀溶液中c（H⁺）=10^-amol/L，c（OH^-）=10^-bmol/L，已知a+b=12

该温度下水的离子积K_w=______；t______25℃（填“大于”、“小于”或“等于”）．向该溶液中逐滴加入pH=c的盐酸（t℃），测得混合溶液的部分pH如表所示．