题目

I was diagnosed with cancer in September 2005, after discovering a small lump in my neck. All seemed well after the lump had been removed. However, a follow-up blood test revealed that the cancer had spread. I underwent chemotherapy(化疗), and within four months I lost nearly 20kg, all my hair and energy.     I got a tentative all-clear(解除警报)two days after my 28 the birthday. To me, it signaled a new start, and I couldn’t wait to get on with my life. The doctors told me that it would be months before I could get back to my old activity levels, but I just didn’t want to如图5所示是一种环保型手电筒，这种手电筒不用化学电池作为电源。使用时只要将它来回摇晃，就能发光，并且来回摇晃得越快，手电筒发光越亮。这种手电筒所产生的电能是根据          原理获得的，其能量转化是           能转化成电能。