题目

判断下列说法是否正确.(1)在投掷一枚均匀硬币的试验中,出现正面向上的概率是0.5,即投掷2次硬币就会出现一次正面向上.（    ）(2)某彩票的中奖概率为,意味着买1 000张彩票就一定能中奖.（    ） 答案：答案:×  ×听下面一段材料，回答第1至2题。 1. What is the woman planning to do this evening? A. To see some Italian friends off.B. To visit Tom.C. To have dinner with some Italian friends.2. What's wrong with the man? A. He has taken a lot of medicine. B. He has forgotten the date.C. He has got a headache.