下列关于R型肺炎双球菌的叙述正确的是（　　　）

网络小说是以网络为平台发布的小说，更新速度快、风格自由，受到不少人追捧。但由于网络小说写作门槛低，一些写手为了保证阅读量，往往连夜赶稿，这也导致部分网络小说情节和语言经不起推敲，甚至用暴力、色情为噱头吸引读者。这表明 （  ）
①网络小说是一种快餐文化，不宜发展        
②文化创新能促进文化的发展
③只要是人民大众真正需要的都应倡导和引导  
④发展网络小说是文化建设的要求 

秃顶是一种单基因遗传病，男性秃顶明显多于女性，女性杂合子表现为非秃顶，患者一般35岁左右开始出现秃顶．图1是某秃顶家族系谱图，相关基因用B和b表示，图2是某白化病家族系谱图，相关基因用A和a表示（两家族互不带有对方家族的致病基因）．请据图回答有关问题：

   A pretty, well-dressed young lady stopped a taxi in a big square, and said to the driver, “Can you see that young man at the other side of the square?”
   “Yes,” said the taxi-driver. The young man was standing outside a restaurant and looking impatiently at his watch every few seconds.
   “Take me over there.” said the young lady.
   There were a lot of cars and buses and trucks in the square, so the taxi- driver asked, “Are you afraid to cross the street.”
   ‘Oh, no !” said the young lady. “But I said that I would meet that young man for dinner at one o’c1ock, and it is now a quarter to two. If I arrive in a taxi, it will at least seem as if I have tried not to be too late.”

(2015·四川）设四边形ABCD为平行四边形，，.若点M，N满足，，则（    ）