下列说法正确的是( )
A:鞋店老板比较关心的是一周内卖出的鞋的尺码组成的一组数据的众数
B:某种彩票的中奖率是2%,则买50张这种彩票一定会中奖
C:“打开电视,正在播放《新闻联播》”是必然事件
D:若甲组数据方差S甲2=0.06,乙组数据的方差S乙2=0.1,则乙组数据比甲组数据稳定
判断:
要求长方形的周长必须要知道长方形的长和宽.
阅读下面的文章,根据所给的中文正确拼写单词,使文章意思完整。一空一词 I have been in Australia for two weeks. I'm____ (过) a good time here, although I have to be ____ (诚实) and say that I ____ (更喜欢) China. I'm lucky to be here for my one- year English ____ (课程). It’s a great challenge for me. I will try my best to ____ (处理) with each of them. I used to spend too much time ____ (闲谈) with others on the Internet. Now I have ____ (意识到) I must take the chance. And I mustn't____ (浪费) time or money. Australia is the____ (六) largest country in the world and Sydney is a beautiful city, but I have no interest to go sightseeing. I'm ____ (自信) of myself I can catch up with others. I will memorize the experience in Australia.