人进入青春期后，女孩每月一次的子宫出血现象，叫做____。男孩有时在睡梦中出现精液排出的现象，叫做____。

根据短文内容及首字母提示补全单词，使短文完整、通顺

    Nowadays, we are in a modern society. Everybody should be p____ in public. But sometimes some people like to c____ in line when they buy tickets or get on the bus or subway. They take other's places as well as time when they are in line, so it is i____. I can't s____ that. Sometimes, I even get mad when I see them cut in line.

    When this h____, I often say, “Would you mind w____ in line? ” But sometimes some of them are angry w____ me and they say, “It's none of your business. ” So I f____ angrier. Then I only tell it to the people who sell the tickets. At last the people who are breaking the r____ of etiquette don't get their tickets. So I am happy and the people who cut in line are u____.

两个大小相等同时作用于同一物体的共点力，当它们间的夹角为90°时，其合力大小为 $\sqrt{2}$ F；当它们之间的夹角为120°时，合力的大小为（   ）