Some girls of my age like stars like TF boys, and boys are crazy about basketball players. They think heroes need to be handsome, strong, rich or very clever. But for me, a hero always h____ others in trouble.

    My hero is Uncle Bruce. His father is a worker. Uncle Bruce is the eldest son in his family and he has four y____ brothers and sisters. He was not good at his school lessons. He had to l____ school at a very young age. He worked and gave all his money to his parents. When he was older, he found that he was good at r____ things. He was very interested in it, too. He collected broken things and fixed them into g____ ones. Slowly, he could fix a____ everything that did not work. He worked hard and never gave up. Finally, he o____ his own shop. It took him about 20 years to become a successful shopkeeper. Now, he is very rich and has a____ four shops. But Uncle Bruce never forgets the day when he had nothing. He gives money to poor families, gives poor kids books to read and offers them f____ meals. He also encourages people to reuse things. As he always says, "Make good use of what you have b____ we have only one earth.

我们日常生活中遇到的下列现象，由公转引起的是（    ）

上述操作过程正确的是（   ）

研究人员用同种小鼠进行了某项实验，实验设计和结果如表所示，请据表分析回答：

（1）若要观察小鼠皮下脂肪细胞中的脂肪颗粒，可用____ 染液染色后加以判断．

（2）请拟定实验题目____ ．

（3）现有健康的体重相近、发育状况相同的雌雄小鼠各100只，按上表的实验设计，应如何对这些小鼠进行分组？____ ．表中所示的实验，自变量有____ ．

（4）甲组和乙组对照可说明____ ．上表实验结果可初步说明该中药制剂能对小鼠起什么作用？____ ．

（5）研究人员认为，还需要观察中药制剂单独使用时对小鼠肝脏脂肪含量的影响．请完善实验步骤：

①步骤一：按上表所示的实验设计的要求增加3组小鼠，并编号．

②步骤二：这3组小鼠除每天喂养相同的饲料外，还需分别喂0.05g、0.10g、0.15g的中药制剂共11天．同时在第8至11天注射____ ，并保持其它条件适宜且相同．

③步骤三：测量并统计实验结果，将得到的实验结果与上表的____ 组的结果进行对照，然后得出结论．