问题
填空题
取一根长度为4m的绳子，拉直后在任意位置剪断，那么剪得的两段都不少于1m的概率是______．
答案
记“两段绳子的长都不小于1m”为事件A，
∵绳子的总长为4米，而剪得两段绳子的长都不小于1m
∴如图所示，只能在中间2m的部分剪断，才能使剪出的两段符合条件
根据几何概型的概率公式，可得事件A发生的概率 P（A）=
．1 2
故答案为：
．1 2
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取一根长度为4m的绳子，拉直后在任意位置剪断，那么剪得的两段都不少于1m的概率是______．
记“两段绳子的长都不小于1m”为事件A，
∵绳子的总长为4米，而剪得两段绳子的长都不小于1m
∴如图所示，只能在中间2m的部分剪断，才能使剪出的两段符合条件
根据几何概型的概率公式，可得事件A发生的概率 P（A）=
．1 2
故答案为：
．1 2
There was once a lonely girl who wanted love very much．One day while she was walking in the forest，she found two birds．She took them home and put them in a small 1 ．She was happy to have two“friends”．She 2 them with love and the birds grew strong．One day the girl forgot to close the door of the cage．The 3 of the two flew out of the cage．The girl was afraid that it would fly away．She caught it quickly．She felt glad that she caught the bird before it could fly away．Suddenly she couldn’t 4 a sound from the bird．When she opened her hand，the bird was already（已经）dead．Her 5 killed(杀死)the bird! Then she saw 6 bird jumping up and down 7 the cage．She could feel its great need for freedom．It wanted to fly into the blue sky．So she let it fly away 8 ．The bird circled(转圈)once，twice，and three times．The girl 9 as the bird flew．She didn’t care about losing the bird any more．She wanted it to be happy．Suddenly the bird flew closer and landed softly on her shoulder．It sang the 10 song she had ever heard(她所听过的)． The fastest way to lose love is to hold it too tightly，and the best way to keep love is to give it wings．
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