ABC企业面临某风险在一年内的损失分布如表1所示，四种备选的风险管理策略、相应的忧虑

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中的两项为多途选项。

     More than half of young black men in the United States do not finish high school. Many grow up without

fathers and in neighborhood with gangs, drugs and violence. Sixty percent of those who drop out of school

have spent time in prison by the age of thirty-five.

     Joe Marshall co-founded the Omega Boys Club in San Francisco, California twenty-three years ago. He

tries to give these children a safe refuge (避难所) and a better future. 1_____. Twice a week, it offers after-

school classes in math, reading family and life skills, and college preparation. In many ways, it serves as a

kind of family. It provides teenagers with structure and support.

     Mr. Marshall spent twenty-five years as a teacher and administration in San Francisco. 2_____ He sees

gangs and violence as a disease that needs to be dealt with as a public health problem.

     "We tell them to follow some new rules for living. 3_____." The Club represents what he calls the "alive

and free movement." 4_____ In 1991, Joe Marshall started "Street Soldiers", a weekly call-in show.

     Marlena was one of the graduates of the Omega Boys Club. "She's at Southern University right now, going

into her third year. She talked about what she had learned the hard way and how we help her learn that by

coming to Omega, by listening to 'Street Soldiers '. 5_____" Joe Marshall said.

     Mr. Marshall is sixty-three this year and he wants to build an institution. "I'm not going to be here forever,

so my big thing is to make sure this goes on."

A. She said she had learned how to love herself.

B. That's what these young people get in the street.

C. A lot of my former students ended up in prison for selling drugs.

D. But his most effective way to spread his anti-violence message is through radio.

E. The Omega Boys Club serves more than four hundred young people every year.

F. He taught math in middle school and expected to see his best students go to school.

G. These rules will decrease their chances of ending up dead or in prison and increase their chances

     dramatically of staying alive and free.

茶多酚是一种天然抗氧化剂，具有优越的抗氧化作用，请简述其抗氧化机理。

集团客户采购的（）阶段非常重要，客户在选择评估阶段或招标阶段明确提出的技术标准、采购标准通常诞生在这一阶段。

A.需求意识

B.需求定义

C.选择评估

D.决定购买

用人单位承担的义务有（）

A.为劳动者劳动权利的实现提供条件保障

B.履行劳动合同

C.为劳动者组建工会

D.提请劳动争议处理

E.改善和提高劳动者福利待遇

不携带所规定的人兽共患病病原和动物烈性传染病的病源，不携带对动物危害大和对科学研究干扰大的病原，这样的实验动物是（）。

A.普通级动物

B.清洁级动物

C.无特定病原体级动物

D.无菌动物