美国Framingham研究了各心血管疾病危险因素的回归系数，回归系数的大小表示联系的大小，则（）

A.系数越大，联系越大，系数为正数.表示正相关，若为负数则为负相关

B.系数越大，联系越小，若为正数表示负相关

C.若为负数，表示正相关

D.若系数为正数则有保护作用

E.系数的大小与危险因素关系不大

根据句意和首字母提示完成单词。

1. It's important for the students to p_____  reading English in the morning every day.

2. Chen Xiexia from Guangdong won the first gold   medal for China at the 2008 Beijing Olympics

    and broke a world r_____

3. Xu Haifeng won a g_____   the 1984.

4. I b_____Olympicsin weight liftingmedal in shooting atthat I can pass the exam easily.

5. The ancient O_____Games began in Greece in  776 BC.