植物体能够由小长大，主要依靠细胞的____使细胞数目增多，其次是依靠细胞的____使体积增大。

小明同学在研究物质密度时，测量了四种固体的质量与体积，把它们在如图所示的坐标中表示出来，根据图象同学们认为：①ρ₁＞ρ₂=ρ₃＞ρ₄；②ρ₁＜ρ₂=ρ₃＜ρ₄；③m₁=m₂＞m₃＞m₄；④V₁=V₂＞V₃＞V₄．以上说法中正确的是（　　）

                                                                                                                                                                                

阅读下文，回答相关问题。
        十年春，齐师伐我。公将战。曹刿请见。其乡人曰： “肉食者谋之，又何间焉？”刿曰： “肉食者鄙，未能远谋。 ”乃入见。问： “何以战？”公曰： “衣食所安，弗敢专也，必以分人。 ”对曰：“小惠未徧，民弗从也。 ”公曰： “牺牲玉帛，弗敢加也，必以信。 ”对曰： “小信未孚，神弗福也。 ”公曰： “小大之狱，虽不能察，必以情。 ”对曰： “忠之属也。可以一战。战则请从。 ”                                                                            （节选自《曹刿论战》）

阅读理解
    Benedict Alien was born in England in 1960. His dad was a pilot，and Benedict dreamed of traveling around the world like his dad. His dream came true. Benedict became an explorer. But he doesn' t travel the world in a plane. He finds a place he wants to explore，and then he lives with the local(本地的)people. He learns important skills, from them，and then uses those skills to explore the place he's visiting. He doesn't use modern things like cellphones(移动电话)，and he likes to travel alone.

    Benedict's explorations are often dangerous，but he likes them. One of his favorite explorations was in 2001. He wanted to be the first person to travel alone across the ice from Siberia to Alaska. So he went to Siberia and lived with the Chukchi people. He learned how to live like the Chukchi people and drive a dog team. He traveled 622 miles with only a dog team. The weather was really bad. There was a lot of snow, wind and ice，so the journey was very difficult. Benedict almost lost the dog team，and he almost died，so he ended his journey early. It was scary, but he learned a lot.

史书记载，盛唐时期邢窑白瓷“天下无贵贱，通用之”。此材料反映了盛唐时期（    ）