11. The image shows the calendar that comes with the Windows operating system. There is a very magical flower that blooms every Wednesday and Friday in odd-numbered months, and every Tuesday and Thursday in even-numbered months. For example, October 1, Tuesday, is a time when it blooms. So, from November 1, 2013, to December 31, 2013, how many days will this flower bloom?
【Analysis】 November has 9 times, December has 9 times, in total $9+9=18$ (times).





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