37. By saying“With print ads, you are helping to keep newspapers and magazines alive"(Para. 1),the writer means that__________
A) your investment is important to newspapers and magazines
B) your ads are helping newspapers and magazines survive
C) print ads are more attractive than TV and e-mail ads
D) print matters are less expensive than e-mails
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38. According to the passage, if you place an ad on TV, you are unable to know________
A) how often your ad is displayed
B) how much your ad costs
C)when your ad is shown
D) who your audience is
39. If you market by e-mailing, you can learn within a day__________
A) who have opened your messages
B) how old your message readers are
C) what quality your advertised product has
D) how much your advertising messages cost
40.What enables the e-mail ad readers to do their own research?
A) The TV program ratings and reviews.
B) The product's color and size.
C)The electronic links.
D)The shopping carts.
python 自带的开发环境是( )
A. IDE
B. IDLE
C. Pycharm
D. Anaconda