搜题请搜索小程序“爱下问搜题”
问题 单项选择题

解体出厂的轴流风机组装和安装时，通风机的安装水平，应在基础或支座上风机的底座和轴承座上纵、横向进行检测，其偏差均不应大于（）/1000。

A、1

B、2

C、3

答案

参考答案：A

填空题

（1）已知可逆反应2NO2(g)N2O4(g) ΔH＜0，在一定条件下已经达到平衡。若恒容条件下升温，平衡 移动___________（填“向左”“向右”或“不”）；若只缩小体积气体颜色将_________(填“加深”、“变浅”或“不变”)；若在恒温、恒压条件下向平衡体系中通入氩气，平衡_________移动（填“向左”“向右”或“不”）；使用催化剂_________反应的ΔH（填“增大”“减小”或“不改变”）。

（2）O2(g)=O2+(g)+e- ΔH1= 1175．7 kJ·mol-1

PtF6(g)+ e-PtF6-(g) ΔH2= - 771．1 kJ·mol-1

O2+PtF6-(s)=O2+(g)+PtF6- ΔH3=482．2 kJ·mol-1

则反应O2(g)+ PtF6(g) = O2+PtF6-(s)的ΔH=_____________ kJ·mol-1。

查看答案
填空题
情景交际。(5分)
根据对话情景选择恰当的选项，其中有一项是多余的。

A.      How much does a standard room cost?
B.      I’m Maria and my telephone number is 8257-0169.
C.      When do you want them?
D.      Which kind do you want?
E.       What can I do for you?
F.       We are sure that conditions here will make you feel comfortable.

 
 

 
Clerk: Good morning, Lantian Hotel. _小题1:____
Maria:  Good morning, I want to book some rooms.
Clerk:  OK. We have rooms with a bathroom, TV, fridge and air conditioning. _小题2:___ Also, from the windows you can see the mountains.
Maria:  ___小题3:___
Clerk:  A standard room with two single beds costs ¥100 and a room with one single bed costs ¥80.
Maria:  OK. I want to book 10 standard rooms with two single beds and one room with one single bed.
Clerk: __小题4:____ And how long do you plan to stay?
Maria:  From April 13th to 15th, two nights.
Clerk: May I have your name and telephone number, please?
Maria: Sure .____ 小题5:________.
Clerk: Right .Thank you.
查看答案