由1分子磷酸、1分子碱基和1分子化合物a构成了化合物b,如图所示, 则叙述正确的是( )
A:若m为腺嘌呤,则b肯定为腺嘌呤脱氧核苷酸
B:若a为核糖,b则为DNA的基本组成单位
C:若m为尿嘧啶,则DNA中肯定不含b这种化合物
D:若由b构成的核酸能被吡罗红染成红色,则a必为脱氧核糖
《口技》一文的作者是____代的____。文章节选自《虞初新志》,《虞初新志》是清代张潮编选的____小说集。
名句默写
①《蜀道难》中写水石激荡,山谷空鸣的场景的句子是:____,____。
②《锦瑟》借两个古人典故,表达对美好感情的追怀又生出凄凉悲慨的句子是____,____。
③《登高》借落叶和江水来抒发光阴易逝、壮志难酬的感伤的句子是____,____。
④《琵琶行》中点明诗人秋夜送友人这一事件并渲染出凄凉气氛的句子是____,____。
⑤____,一夫当官,万夫莫开。《蜀道难》
Now,an Internet game became more and more popular. People can “farm” on a piece of “land” and “grow”,“sell”(卖)“vegetables”, “flowers” and “fruits” on the Internet. They can make some e-money and buy “houses”.What do people think of this game? Here are, some ideas.Harold:I think they don'like the real world and it is hard for them to face the real world.Allan:Having fun together is the most exciting thing about it.Laura:People are looking forward to the life in the village. It can help them understand the real world.Ivy:It's just waste(浪费) of time. People will not focus on(专注于)their work or study if they spend too much time on it.
在一次安全教育进校园活动中,下列关于家庭用电的“对”、“错”抢答比赛,应回答“对”的是( )