以“Reading is fun”为题,写一篇不少于五句话的短文。
Reading is fun
I am a student. I like reading very much. I always go to the bookstore with my friends at the weekend. I have many books. I think reading is fun.
—The one with _____ umbrella? She is our monitor.
如图所示BC//DE,∠1=108°,∠AED=75°,则∠A的大小是( )
原发性低血压是一种人类的遗传病.为了研究其发病率与遗传方式,正确的方法是( )
①在人群中随机抽样调查并计算发病率 ②在人群中随机抽样调查研究遗传方式
③在患者家系调查并计算发病率 ④在患者家系中调查研究遗传方式.