在水温和搅拌条件相同的情况下，我们可以通过____加快水果糖的溶解。

为了探究雾霾天气对植物光合作用的影响，某研究小组选用生长状况相同的同种植物盆栽苗，分成相同的甲、乙、丙三组，置于20℃的人工温室．对甲组和乙组的光照强度进行人工控制（如图1），丙组不做处理，其他培养条件相同．请分析回答下列问题：

我国宪法规定的公民基本权利涉及政治、经济、文化等各个领域，涵盖家庭生活、学校生活、社会生活等各个方面。这体现了公民权利的（    ）

下列关于细胞增殖、分化、衰老、癌变的叙述，不合理的是（　　）

①幼年个体中没有衰老的细胞，老年个体中没有新细胞产生；

②由胚胎干细胞诱导分化成肾脏体现了细胞全能性；

③细胞凋亡对机体有利，细胞坏死对机体有害；

④细胞分化导致细胞中遗传物质改变；

⑤癌细胞是畸形分化的结果；

⑥衰老的人红细胞呼吸代谢速率减慢，细胞体积减小，核体积增大．

阅读下列短文，从每题所给的四个选项（A、B、C和D）中选出最佳选项。
      When an animal helps another animal，it usually gets something valuable in return. For a long time，many scientists thought that only people could act generously just because it feels good.
      However，a new study in Germany suggests that chimpanzees (an animal like a large monkey without a tail ) also do good things for no real reason. And so do children who are as young as 18 months of age. Maybe it is because humans and chimpanzees share an ancestor about 6million years ago.
      People and chimpanzees appear to develop such features without any other training，says Warneken，a scientist in Germany.
      Warneken and his partners worked on adult chimpanzees that live on an island in the African country of Uganda. They also worked with 18-month-old children in Germany. The researchers performed three experiments on the adult chimpanzees and two experiments on the kids. In the first animal experiment，a person tried to reach his arm into a cage to get a stick，but he couldn't reach it. A chimpanzee was in the cage，and it could reach the stick if it wanted to.
      Thirty-six chimpanzees took part in this experiment one by one，and no chimpanzee saw what the other chimpanzees had done. Even though the animals hadn’t met the person before，they usually took the stick and gave it to the person. What's more，they did this whether or not the person offered them bananas as a reward.
      In a similar experiment，36 children acted in a similar way. They helped the person reach the stick，whether or not they were offered toys for their help.
      Researchers did other experiments on chimpanzees and babies. No rewards were offered in either experiment. And still，both the chimpanzees and children went out of their way to help. Still，the new study is different from earlier findings. Researchers have found that chimpanzees don't give rewards of food to other chimpanzees，even if it costs them nothing to be generous.