1I was six years old when, one day, my dog was struck, by a car while getting ready for sc

什么叫近交和近交系数?如何计算近交系数?

上图为一个双表亲结婚所生孩子S的家系，请计算S的近交系数。

选答题

在学校里，尤其是中小学校里，我们经常会发现一部分学生打架闹事，无事生非，屡教不改，是非颠倒，不知荣辱美丑，不分公私，严重者甚至处于犯罪的边缘或者已经有轻微的犯罪行为……这类学生通常被称为品德不良的学生。那么，请阐述何谓品德不良?分析其形成原因以及教育对策。

the diagram and analyze the possible causes. You should write at least 150 words.

1998-2004年全国工程硕士硕士录取人数

工程硕士：Master of Engineering

已知：某日巴黎外汇市场欧元对美元的报价为

即期汇率1.8120/50

3个月70/20

6个月120/50

客户根据需要，要求：

(1)买入美元，择期从即期到6个月；

(2)买入美元，择期从3个月到6个月；

(3)卖出美元，择期从即期到3个月；

(4)卖出美元，择期从3个月到6个月。

ild born in 2007 until his or her 18th birthday, the U.S. government reported on Monday.

Child care and education costs will represent a larger share of costs for raising the '07 baby through adulthood than they have in the past, the Agriculture Department said in an annual study on child-rearing costs.

"The cost of providing food decreased from 24 percent to 17 percent of total child-rearing costs, while child care and education expenses increased from 2 percent to12 percent," the department said.

Housing will be the single largest cost for U.S. families—making up 33 to 27 percent of total expenses across income groups, USDA said.

Factoring in inflation, the grand total for middle-income families comes to $269,040, USDA said. Total costs also include transportation, health care, and other necessities.

How I Overcome My Difficulty in Learning English

(1)你在英语学习中有哪些困难?

(2)你是如何克服这些困难的?

(3)这些方法给你带来的收获。