ǵ Ὠ 侰 㻐 侱 常 侲 綠 侳 鴈 侴 뱰 侵 � 侶 נּ 侷 ᪨ 侸 㨐 侹 奸 侺 磠 侻 顈 侼 랰 侽 휘 侾 便 ᗨ 俀 㕐 俁 咸 係 敘 促 . 13% of youcould be waiting a long time…哦，孩子。13%的单身母亲要等更长的时间……Related: How I LearnedAbout Sex: A lesson in what not to do讲述：怎样学习性：不该做的经验I'm a divorced, singlemother. After I split with my ex, I was so broken down emotionally, sex was thelast thing on my mind. I know some people (especially men) are able to jump outof their marriages into multiple beds, but I didn't. Because I couldn't. Buteventually I did want to start having sex again, and so I |waited until the rightmoment came along and had a perfectly bland textbook one-night stand. And I'm sohappy it happened that way. His semi-hard whiskey dick provided exactly thegentle nudge I needed to get back in the game. (He was lovely, the whole thinglovely and very sweet really, but in hindsight I think he may have been married.No ring though. Not my fault!)我是个离婚的单身母亲。在我和前夫离婚后，我的情绪非常低落，性是我脑子里唯一剩下的东西。我知道一些人（尤其是男人）有婚外情，但我没有。因为我不能。但最终我想再次开始性生活，所以我等待知道那个对的时刻到来一个完美单调的一夜的停留。我乐于以这样的方式进行。他的半硬的阴茎给我恰到好处轻柔的刺激，那正式我想得到的。 （他是可爱的，整件事情都是甜蜜而富有爱意的，但是事后，我想他可能已经结婚了。但没有看到他的戒指，不是我的错。 ）Anyway, the greatthing about co-parenting with an ex is that it allows you both to have sexy|time. (With other people. Not with each other. That's something you should neverdo! Though I did think about it once. I asked my ex to have sex with me and hesaid okay, but then we started talking and I made him cry about how he'dmistreated me, and that was so much better than an orgasm.) A few weeks after Ipopped my divorce cherry, I saw the opportunity for another one-nighter and tookadvantage. Eventually I started dating someone, and though it didn't work outlong-term, we had so much sex. Makeup sex. Not the kind of sex you have after afight, the kind of sex you have after you haven't had that kind of sex foryears. The kind of sex that makes you happy to be alive. The kind of sex thatmakes you want to let your kid have ice cream for breakfast. The kind of sexwhere you're angry and crying and laughing all at the same time! (Oh, just me?|Okay.)不管怎样，和前夫共同养育子女最棒的事是可以有迷人的性感时间。 （和其他人，不是和某人彼此。那是你从没做过的事！虽然我只想过一次。我请求我的前夫和我做爱，他说好，但是后来我们开始谈话我谈到他不公的对待使他大叫，这比性高潮更好。 ）离婚后的几个礼拜，我看到了另一个一夜情的机会并抓住机会。最终我开始和人约会，即使这不是长期有效，我们做了很多次。做爱，不是在争吵后的那种性，是那种在你很多年都没发生过性后的那种。它是你感到愉悦和活着的乐趣。这种性使你想让你的孩子用冰淇淋当早餐。这种性使你在同一时间生气，狂叫，大笑。（好吧，这就是我吗？）Related: 10 reasons hestill wants sex while you're pregnant讲述：当你怀孕是他还要做爱的十个原因Now that we'vestopped seeing each other, I don't know when I'll have sex again, and I don'treally care. I like sex as much or more than the next guy, but I have to feelcomfortable with someone to have sex with them, so that means really random|one-nighters are out of the question. (And probably aren't very safe, anyway.)YourTango suggests “friends with benefits“ as a healthy solution, but I don'tknow. So many of my gal pals have stories of those types of relationships goingwrong. The common notion is, “someone always gets hurt,“ because it's hard tohave sex without getting emotional (just nod your head and play along, fellas).So I guess I'll just have to wait this one out and see what happens. When mydaughter's away, maybe I'll go to a movie with one of those moms who'sabstaining 'til she finds true love. I'm sure she could use a pick meup.既然我们已经停下来看看彼此，我不知道什么时候在要做爱，我也不关心。我想有比跟下个人更多的性，但我和他们做爱要感到舒服，那意味着一夜情不在话下。 （不管怎样可能不是很安全。 ）YourTango|网上说炮友像是健康隐患，但我不这么认为。很多我的女友这种类型的关系变得不好。普遍的观念是总有人受伤，因为很难没有感情而发生性（只是点头之交一块玩乐的伙伴） 。所以我想我必须等待这个人出现然后看能发生什么。当我女儿离开时，也许我会和以为不找到真爱就自我抑制的单身母亲去看电影。我确定她会时常带上我。1 ℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡℡.知识点串讲必修四.第一章：三角函数1.1．1 任意角1、角的有关概念： ①角的定义：角可以看成平面内一条射线绕着端点从一个位置旋转到另一个位置所形成的图形． ②角的名称： ③角的分类： 2、象限角的概念： ①定义：若将角顶点与原点重合，角的始边与 x 轴的非负半轴重合，那么角的终边(端点除外)在第几 象限，我们就说这个角是第几象限角．终边相同的角的表示：所有与角 α 终边相同的角，连同 α 在内，可构成一个集合S＝{ β | β = α + k·360 ° ，k∈ Z}，即任一与角 α 终边相同的角，都可以表示成角 α 与整个周角的和．注意：⑴ k∈ Z ⑵ α 是任一角；⑶ 终边相同的角不一定相等，但相等的角终边一定相同．终边相同的角有无限个，它们相差360°的整数倍；⑷ 角 α + k·720 °与角 α 终边相同，但不能表示与角 α 终边相同的所有角．3、写出终边在 y 轴上的角的集合(用 0°到 360°的角表示) ．解:{ α | α = 90°+ n·180°,n∈Z}．4、已知 α 角是第三象限角，则 2α ， 各是第几象限角？解： Q角属于第三象限， k·360°+180°＜ α ＜ k·360°+270°(k∈Z)因此，2 k·360°+360°＜2 α ＜2 k·360°+540°(k∈Z)即(2 k +1)360°＜2 α ＜(2 k +1)360°+180°(k∈Z)故 2α 是第一、二象限或终边在 y 轴的非负半轴上的角．又 k·180°+90°＜ ＜ k·180°+135°(k∈Z) ．当 k 为偶数时，令 k=2n(n∈Z)，则 n·360°+90°＜ 2＜ n·360°+135°(n∈Z) ，当 k 为奇数时，令 k=2n+1 (n∈Z)，则 n·360°+270°＜ ＜ n·360°+315°(n∈Z) ，因此 2属于第二或第四象限角．1.1.2 弧度制1、弧度制我们规定,长度等于半径的弧所对的圆心角叫做 1 弧度的角；用弧度来度量角的单位制叫做弧度负角：按顺时针方向旋转形成的角 始边终边顶点 AOB正角：按逆时针方向旋转形成的角零角：射线没有任何旋转形成的角.制．在弧度制下, 1 弧度记做 1rad．在实际运算中，常常将 rad 单位省略．2、 弧度制的性质：①半圆所对的圆心角为;r②整圆所对的圆心角为.2r③正角的弧度数是一个正数． ④负角的弧度数是一个负数．⑤零角的弧度数是零． ⑥角 α 的弧度数的绝对值|α|=. l3、弧长公式 rl弧长等于弧所对应的圆心角(的弧度数)的绝对值与半径的积． .,,216. 是 圆 的 半 径是 扇 形 弧 长其 中积 公 式利 用 弧 度 制 证 明 扇 形 面例 RllRS证法一:∵圆的面积为 2R,∴圆心角为 1rad 的扇形面积为21,又扇形弧长为 l,半径为 R,∴扇形的圆心角大小为lrad, ∴扇形面积ll2．证法二:设圆心角的度数为 n，则在角度制下的扇形面积公式为 3602RnS，又此时弧长 180Rnl，∴RlnS2180．可看出弧度制与角度制下的扇形面积公式可以互化，而弧度制下的扇形面积公式显然要简洁得多． 2:l一1.2.1 任意
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