单词拼写。

1. It's important for us to ________ (体验) nature.

2. Their travel ________ (目的地) is the seaside.

3. Let's ________ (合并) learning with relaxation.

4. We'll go on our ________ (各自的) holidays.

5. You must pay attention to your ________ (安全) when crossing the road.

6. Our city was struck by the heavy flood. With the help of the government,

    everything returned to n________ quickly.

7. Some people travel for learning, and (while) others travel for p________.

8. Rafting is more a________ than hiking.

9. We should protect the e________ and love nature.

10. Have you c________ making friends with Tom?

设有关系模式W(C,P,S,G,T,R)，其中各属性的含义是：C为课程，P为教师，S为学生，G为成绩，T为时间，R为教室，根据定义有如下的函数依赖集：
F={C→G,(S,C)→G,(T,R)→C,(T,P)→R,(T,S)→R}
W的规范程度最高达到 (10) 。若将关系模式W分解为3个关系模式W1(C,P)，W2(S, C,G)，W3(S,T,R,C)，则W1的规范化程度最高可达到 (11) ，W2的规范化程度最高可达到 (12) ，W3的规范化程度最高可到达 (13) 。