心肌慢反应细胞动作电位0期去极化的形成是由于（） A.Na+内流 B.K+外流 C.

信息归纳。请仔细阅读，按信息表中的项目要求填写信息。
In today’s fast –paced(快步伐/节奏的)culture, many people may feel like they ‘re too busy to read a book. In fact, a recent survey found that reading rates (比率)are falling in the US. Young people in particular(特别的)are more likely to spend their free time watching TV or surfing the Internet than reading a novel or nonfiction(非小说类文学作品)book. According to the survey results, the average(平均) 15 to 24-year-old living in the US spends 2 hours per day watching TV, and only 7 minutes reading for pleasure. Considering all the high-tech forms of entertainment out there, from video games to cyberspace（赛博空间）, maybe it’s not surprising that fewer people read these days. But is reading just an old-fashioned pastime, or is it a lost art? Marni，an office worker, said, ”I’m reading the most incredible(不可思议的) book right now, and I can’t even imagine not having that in my life, like not loving reading.” What ‘s your opinion?
Information Card

小题1:Rates	a recent survey found that reading rates (比率)are _________________in the US.
小题2:Age	the average(平均)____________ living in the US spends much time per day watching TV
小题3:Period	The young in the US spends 2 hours per day watching TV, and only ___________reading for pleasure.
小题4:person	__________says that he can’t imagine not reading in his life.
小题5:Activities	The survey shows the young in the US often watch TV or_________ when they are free.