针对产品本身的风险，可采取建立产品安全数据库的办法。

阅读下面短文,根据文章内容回答下列问题.

     When I was at primary school in the second grade, I used to follow my elder sister who is five

years older than me. She loved sports and was always playing basketball and softball. She was also

a runner and was good at it. She brought home some running awards, so I was motivated and started

running, too.

     I started training at school and never missed even a day. Even if it was raining, I was training. At first

I was not very good; but as the years passed, I got better and better and started to win some competitions.

Breaking records

      In 1994, I won the Mexican National Championships. Later, I won fourth place in the Pan-American

games that were held in Santiago de Chile. In 1996, I broke the Mexican record; and in 1997, I won

fourth place in the Central American Games. In 1997 and 1998, I again won the Mexican National

Championships and broke the Mexican records. Now I want to improve my personal record of 19

feet, 2 inches.

Plans for the future

     I'm in Houston now, training with coach Tom Tellez at the University of Houston. He is the best

coach in the world. He also trained Carl Lewis, one of the best US athletes. I have the support of my

parents who always come with me to all my meets. I think that's why I'm where I am. Next year

 I have some very important competitions. One of them is in Canada in July 1999. I hope I do well.

1. How did the writer get along with his sister when he was a primary student?

___________________________________________________________________________

2. What did the writer do to win so many championships?

___________________________________________________________________________

3. What does the writer think of his success?

___________________________________________________________________________

4. How about the writer's achievements now?

___________________________________________________________________________

5. What do you think about the writer's future?

___________________________________________________________________________

简述法洛四联症青紫的原因。

对外贸易量主要反映了（）

A.贸易范围

B.贸易规模

C.结算方式

D.贸易风险

定性数据是表示事物属性的数据，以下属于定性数据的是（）。

A.性别

B.姓名

C.年

D.月

血液中LDL的主要功能是转运（）

A.胆固醇

B.外源性TG

C.内源性TG

D.磷脂

E.糖脂