问题
填空题
有4条长度分别为1，3，5，7的线段，现从中任取三条能构成三角形的概率是______．
答案
从4条中任取3条的可能有4种即1、3、5；1、3、7；3、5、7；1、5、7能构成三角形的数有3，5，7一组，故其概率为：
．1 4
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有4条长度分别为1，3，5，7的线段，现从中任取三条能构成三角形的概率是______．
从4条中任取3条的可能有4种即1、3、5；1、3、7；3、5、7；1、5、7能构成三角形的数有3，5，7一组，故其概率为：
．1 4
从方框中选择合适的词，并用其适当形式补全短文。有两个多余。
In Germany, people can celebrate the Lantern Festival every year. The festival is on November 11th. The children can小题1:__________ through the streets with paper lanterns they have made. At Hamburg School the students小题2:__________ celebrate the festival on November 11th from 5:00 pm小题3:__________ 9:00 pm. The festival小题4:__________ games to entertain children. Food and entertainments from the local area are something for every child to小题5:__________. At the end of the festival, there will be a lantern walk. Children can walk through the neighborhood小题6:__________ paper lanterns. A German song is小题7:__________ during the lantern walk. All Germans can sing the song during小题8:__________ lantern festival. This festival is an enjoyable night for children to learn a bit more about Germany. |
