抛掷两枚硬币，掷得一正一反的概率是______，不是两个正面的概率是______

2,4,6

第II卷 (非选择题，满分35分)

第一节. 短文改错 (共10小题; 每小题1分, 满分10分)
注意：1。每处错误及其修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不记分。
We all make plans, so we also change our plans all the time. Sometimes bad weather or traffic stop us. But usual it is just because we are lazy. I planned to go for a picnic for my classmate Wu Jun one month ago. But they still haven’t carried out the plan. One time it was because I don’t feel alright. I put it off. But the other two time it was just because I didn’t feel like go anywhere. I just wanted to stay at home and watch TV. However, I don’t want to be lazy man. So I will go for a picnic with Wu Jun on tomorrow no matter what.