问题
选择题
骰子是一个质量均匀的正方体,它的六个面分别刻有1个、2个、3个、4个、5个、6个点,掷一粒骰子时当1点或5点向上则称为“在手”.那么一次掷骰“在手”的概率为( )
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答案
正方体骰子,六个面上分别刻有的1,2,3,4,5,6六个数字中,
掷一粒骰子时当1点或5点向上则称为“在手”,
∴一次掷骰“在手”的概率为
=2 6
,1 3
故选B.
骰子是一个质量均匀的正方体,它的六个面分别刻有1个、2个、3个、4个、5个、6个点,掷一粒骰子时当1点或5点向上则称为“在手”.那么一次掷骰“在手”的概率为( )
|
正方体骰子,六个面上分别刻有的1,2,3,4,5,6六个数字中,
掷一粒骰子时当1点或5点向上则称为“在手”,
∴一次掷骰“在手”的概率为
=2 6
,1 3
故选B.
The following is the information about an accident.
小题1: Maybe it was _______ when they were climbing the mountain.
小题2: _______ took the wound to the hospital.
小题3: The accident happened in the _______.
小题4: _______ people were hurt in the accident.
小题5: Which of the following statements is NOT true?
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