在一个密闭容器中，盛有N2和H2，它们的起始浓度分别是1.8 mol/L和5.4 mol/L，在一定的条件下它们反应生成NH3，10 min后测得N2的浓度是0.8 mol/L，则在这10 min内NH3的平均反应速率是[ ]
A.0.1 mol/(L·min)
B.0.3 mol/(L·min)
C.0.2 mol/(L·min)
D.0.6 mol/(L·min)
答案：C
| 阅读理解。 | ||||||||||||||||||
| The IOC today launched the bid process for the Games of the XXXI Olympiad in 2016. The 203 National Olympic Committees (NOCs) have been invited to submit the name of a city within their jurisdiction as an Applicant City to host the Games in nine years time. Phase Ⅰ: the candidature acceptance procedure This phase involves a thorough review by the IOC of each city's potential to organize the 2016 Olympic Games. Cities will be asked to reply to a questionnaire. Their answers will be studied by the IOC in order to help the IOC Executive Board to select the cities that will become Candidate Cities and therefore move on to Phase Ⅱ. All relevant information and deadlines relating to the first phase are contained in the Candidature Acceptance Procedure and Questionnaire. Phase Ⅱ: the candidature evaluation procedure
month before the election of the Host City for IOC members to review. Key dates:
| ||||||||||||||||||
| 1. How can the city be admitted into PhaseⅡ? | ||||||||||||||||||
| A. By submitting the name. B. By replying to a questionnaire. C. By getting the IOC Executive Board's admission. D. By submitting their Candidature File. | ||||||||||||||||||
| 2. According to the passage, when will the report of the 2016 Olympics be known to the world? | ||||||||||||||||||
| A. February, 2009. B. March, 2009. C. September, 2009. D. October, 2009. | ||||||||||||||||||
| 3. Where will the result of the Host City of the 2016 0lympic Games be declared? | ||||||||||||||||||
| A. Beijing. B. Copenhagen. C. Toronto. D. Washington. | ||||||||||||||||||
| 4. How long will it take a city to succeed in the election? | ||||||||||||||||||
| A. About l year. B. About 2 years. C. About 3 years. D. About 9 years. |
