泰德给一辆汽车打蜡需要20分钟,冲洗一辆汽车需要60分钟.汤姆打蜡要15分钟,洗车要30分钟.每个人冲洗汽车的机会成本是

memorandum book(备忘录)
from:Paul Anderson
to:Ted Finn
date :October 1
time:17:42
theme:Delay arrival
detail:you don't need to wait Paul Anderson to have lunch .He will arrive at 5 in the afternoon,then you should wait him at the airport and drive him to the
Holiday hotel.He will treat you to dinner.

泰德年龄的一半和杰克的年龄等于本求的年龄各是多少
---最关键的这句条件没有写清楚年龄关系.

蓦然回首,总有一份珍藏的记忆诱发着我们的情愫,历久弥新,足堪玩味,让我感到自己如此幸福.
　　和煦的三月暖阳.
　　我想起了热腾腾的豆浆,那天一大早,姥姥就招呼我喝她亲手做的豆浆.我便和邻居家的伙伴们一起并排坐好,享受着豆浆那淡淡的清香.看着热气升腾、蔓延,我看到姥姥那眯成一条缝的眼睛和那饱经风霜的脸.“好喝吗?”“好喝!姥姥做的豆浆最好喝!”“好喝多喝点,喝完了才有精神上学!”从姥姥手中接过豆浆,一种幸福的感觉在我心中荡漾.喝着一直甜到心里的豆浆,我想不到自己这么幸福.
　　温馨的七月夏风
　　当我开始在食堂吃饭时,就已标志着我进人了初三.我以接近光的速度吃完饭,头也不回地说了声再见就直奔教室.拿着一摞作业本穿行于组与组之间的走道,以最快的速度将其送到每个同学的手中.突然,小刚挡住了我行进的脚步,他接过我手中的作业本轻轻地说：“你的鞋带散了,系一下.”我下意识地弯了腰.谁说初三的同学之间没有友谊?其实每个人的心中都装着62个同学,我想不到我这么幸福.
　　凉爽的十月秋风
　　星期六放学回家,公共汽车上学生特多,待我上车时,车里已被挤得水泄不通.车中人声嘈杂,汽车又摇摇晃晃,我两腿发抖,两只手紧紧抓住车柱,不敢放松.身旁突然传来一个声音：“嘿!你坐下吧!”我顺着声音寻去,是一名陌生的男生,由于拘谨,我支吾着说：“不用了,还是你坐吧.”此时,我心里似拂过和煦的春风,流过甘甜的泉水,萌发出一种感动.后来他坐了不大一会儿,就坚持让我坐.这一刻我能感到一种意外的幸福.
　　原来,幸福时时刻刻围绕在我的身旁：从母亲手中接过的饭碗,心存感激,那就是幸福;在灯下读着朋友的来信,品味友情,那就是幸福;如果你独坐一角,静静听歌,凝神遐想,那就是幸福.

I got A in English. My English teacher said that I was good at listening and writing. I got C in math, My math teacher said that I was a little lazy and I had to work harder. I got A in Chnese. My Chinese teacher said that I did well in it. Can you tell something useful about the report? I want to improve my math. Do you have any good ideas? I hope I can get better results in the final exam. Write me soon.

My name is William Smith,I want ted to answer the phone