题目

How can I fight laziness?     Lazy people will never amount to anything in life. However, laziness can be defeated once a few changes have been made in your mind.     ___36____ . Many people lack sleep constantly, since they stay up too late and get up too early to prepare for work. These people have little motivation once they arrive home. Laziness works hand in hand with a lack of motivation and a tendency to put off things. By adjusting your sleep schedule to provide a few more hours of meaningful rest, you can fight laziness throughout the day.     Another way to fight laz已知圆C：（x-a）2+（y-2）2=4（a＞0）及直线l：x-y+3=0．当直线l被圆C截得的弦长为时，求（Ⅰ）a的值；（Ⅱ）求过点（3，5）并与圆C相切的切线方程．