有NH4NO2分解得氮气和水，在23℃，95549.5Pa条件下，用排水集气法收集到57.5 cm3氮气。已知水的饱和蒸汽压为2813.1Pa，则干燥后氮气的体积为（）
A. 55.8
B. cm3
C. B．27.9
D. cm3
E. C．46.5
F. cm3
G. D．18.6
H. cm3
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In order to make your point clear as soon as possible, we’d better put the topic sentence ______ the paragraph（）
A. in the middle of
B. in the end of
C. at any place in
D. at the beginning of
If a piece of writing is concise, it______（）
A. does not have unnecessary words
B. is short
C. is wordy
D. is emphatic
Which of the following is NOT from the checklist for a summary（）
A. Identify the title and author of the work
B. State the thesis of the original article
C. Include your own opinion in your summary
D. Summarize the key supporting details
—_____ — Certainly, thank you for the invitation（）
A. What do you think of the movie
B. What about an action movie
C. Would you like to buy tickets for 6 a.m.
D. Would you like to go to the movies with me tonight
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