根据首字母或汉语提示，完成句子.

1. S ____ is the first day of the week.

2. There are s ______ days in a week.

3. Houston Rocket is my favorite basketball t ______.

4. I often _______(做家庭作业) at home.

5. I ______(看望) my grandparents every week.

熔断器的熔断电流与时间关系特性曲线，称（）特性。