Where can you buy tomato juice？

Paris to Lyon by train (6) two hours;

A. take
B. took
C. takes

............people from the office see two men they know having dinner together,

A. Whether
B. Even If
C. If

W: Please allow me to introduce you to Mr. Qian, President of our corporation. This is Mr. Black, our American friend.<br>Q: How do you do, Mr. Qian.<br>B: How do your do, Mr. Black.<br>Q: I'm very glad you can come.<br>B: It's very kind of you to have invited me. I really do not deserve your kindness.<br>Q: We appreciate your close cooperation in the recent transaction and the trade between our two countries.<br>B: It's the result of our joint efforts. The purpose of my mission is to promote trade between our two countries.<br>Q: Please sit down and have a cigarette.<br>B: Excellent cigarette !<br>Q: I'm glad you like it. You are a veteran smoker, I guess.<br>B: Aha! (coughing)... I used to be. They say I smoked like a chimney, but now I'm trying to cut down.<br>Q: As a heavy smoker, it's no easy matter to give up smoking. I tried several times and several times. I failed. (laughing)<br>B: There's no harm having one cigarette or two once in a while, but heavy smoking is certainly bad for health.<br>W: Now, dinner is ready. To the table, please.<br>Q: Yes, please.<br>B: Please.<br>Look at the form. below.<br>You will hear three men introducing each other before dinner.<br>Mr. Black comes from (5)______<br>The purpose of the mission is to (6)______ between the two countries.<br>Mr. Black used to be a (7) ______<br>Mr. Qian is also a (8)______

速率常数 k 是

A. 无量纲的参数
B. 量纲为mol·L－1·s－1的参数
C. 量纲为mol2·L－2·s－1的参数
D. 量纲不定的参数

已知反应 A ＋ B ＝ 3 C 正逆反应的活化能分别为 mkJ·mol－1和nkJ·mol－1，则反应热ΔHΘ/ kJ·mol－1为

A. m－n
B. m－3 n
C. n－ m
D. 3 n－m

反应 C（s）＋ O2＝ CO2（g） 的ΔH<0 ，欲增加正反应速率，下列措施中无用的是

A. 增加氧的分压
B. 升高温度
C. 使用催化剂
D. 减少 CO2 的分压

某一反应 A → B ，不论其起始浓度如何，完成 70％ 反应的时间都相同，则该反应的级数为

A. 零级
B. 一级
C. 二级
D. 无法判断

某反应的速率常数 k 的单位为 s－1时，该反应是

A. 零级反应
B. 三级反应
C. 二级反应
D. 一级反应

若浓度的单位为 mol·L－1，时间的单位为min ，则三级反应的速率常数k的单位为

A. mol·L－1·min－1
B. mol－2·L2·min－1
C. mol－1·L·min－1
D. min－1