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  3. The calendar used in Australia and in most other countries was introduced by Pope Gregory XIII in 1582. It provides for 366 days

The calendar used in Australia and in most other countries was introduced by Pope Gregory XIII in 1582. It provides for 366 days

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问题    The calendar used in Australia and in most other countries was introduced by Pope Gregory XIII in 1582. It provides for 366 days in those years for which the year number when divided by 4 gives a whole number (i. e. without a remainder), those years are called leap years. All other years have 365 days. The Gregorian calendar further specifies that years whose year number is divisible evenly by 100 are not leap years, unless the year number is also divisible by 400.
   In a leap year February has 29 days, whereas in a non-leap year it has 28 days.
   A decade is a 10-year period, such as I January 1885--31 December 1894.
Which one of the following years will not be a leap year?
选项 A、2000
B、2024
C、2052
D、3000
答案D
解析 2000既能被4整除，又能被400整除。因此，2000年肯定是闰年。2024年和2052均能被4整除，因此2024年和2052年均是闰年。3000虽然能被100整除，但不能被 400整除，因此3000年不是闰年。
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