8，17，12，24，15，24，20，27，27这组数据的众数是____．

缺词填空。   

    Here are t____ pictures. A man and a boy are in one picture. Who are they? L____ me tell you. The man is Mr. White, and the boy's n____ is Bill. He's the man's son. Now they are in Bill's bedroom. We can see some Chinese b____ on his desk. And on the bed, t____ is a shirt. It's Bill's. His trousers are on it, too.

    Now let's l____ at the other picture. You can see a woman and a girl in it. The woman is Bill's m____ and she's in her daughter, Ann's room. You can see a photo o____ the Whites on the white wall. W____ that on the floor? Oh, it's Ann's hat. but it looks l____ a brown cat.

液体试剂的倾注法是：先取下瓶塞____在桌面上，要让标签应向着____，倾倒液体时，将瓶口与试管口____，缓缓地注入试剂，倾注完毕，盖上瓶盖，标签向外，放回原处．

果实成熟到一定程度时，乙烯含量明显上升．研究表明：果实中乙烯含量的增加与呼吸速率上升的时间进程一致．某实验小组探究不同浓度的乙烯对果实呼吸作用的影响，得到如图所示的结果．分析实验结果可以得到的结论是（    ）

党的十八大报告指出：“在当代中国，坚持发展是硬道理的本质要求就是坚持科学发展。以科学发展为主题，以加快转变经济发展方式为主线，是关系我国发展全局的战略抉择。”要坚持科学发展，就必须 （   ）
①摒弃对GDP增长速度的追求，坚持以人为本      ②通过自主创新推进产业结构调整和发展方式转变  ③充分发挥市场在资源配置中的基础性作用  ④坚持统筹兼顾，推进经济社会的全面协调可持续发展