问题
填空题
用写有0，1，2三个数字的三张卡片摆成三位数的概率是______．
答案
画树状图得：
∵共有6种等可能的结果，用写有0，1，2三个数字的三张卡片摆成三位数的有4种情况，
∴用写有0，1，2三个数字的三张卡片摆成三位数的概率是：
=4 6
．2 3
故答案为：
．2 3
搜题请搜索小程序“爱下问搜题”
用写有0，1，2三个数字的三张卡片摆成三位数的概率是______．
画树状图得：
∵共有6种等可能的结果，用写有0，1，2三个数字的三张卡片摆成三位数的有4种情况，
∴用写有0，1，2三个数字的三张卡片摆成三位数的概率是：
=4 6
．2 3
故答案为：
．2 3
| 用方框中所给单词的适当形式填空，使短文正确，通顺。每词限用一次。 | |
Some people like reading newspapers and 1______ enjoy novels or comic (喜剧的) books. My 2______ books are those about the lives of great people. Reading them always gives me a lot of 3______ on how to make my own life better. Great people are remembered not because they were handsome or beautiful, but because they did not give up 4______ their lives were difficult. They tried to use 5______ chance to change their lives and make the world 6______. One good example is Orville and Wilbur Wright, the two brothers who 7______ the airplane. The plane has 8______ the world into a small village. Hard work, not good luck, is the reason why the Wright Brothers could invent this convenient (方便的) machine and become great people. Today we will remember them when we see planes 9______ in the sky. Whenever I read 10______ about great people, I always learn a lot from them and they encourage me to march on. This is why I enjoy reading about great people's lives. |