In many English homes people eat four meals a day: breakfast, lunch, tea and dinner. People have breakfast at any time from seven to nine in the morning. They eat porridge，eggs or bread. English people drink tea or coffee at breakfast. Lunch comes at one o'clock. Afternoon tea is from four to five in the afternoon and dinner is about half past seven. First they have soups, and then they have meat or fish with vegetables. After that they eat some other things, like bananas，apples or oranges. But not all English people eat like that. Some of them have their dinner in the middle of the day. Their meals are breakfast, dinner, tea and supper and all these meals are very necessary.

晓晓家的宠物狗“乐乐”在外遛完一圈后，在它的皮毛上粘了很多苍耳的果实，这一实例说明动物在自然界中能（　　）

①测液体质量：天平平衡时，放在右盘中的砝码大小和游码的位置如图甲所示，则称得烧杯和液体的质量m为____g．

②测液体体积：将烧杯中的液体倒入量筒中，液面达到的位置如图乙所示，则该液体的体积V为____mL，尽管体积测量方法正确，但大家对他的实验过程及结果进行评估时，发现液体的体积测量值比它的实际值要____（选填“偏大”或“偏小”）．

③小明对测量方法进行修正后，测出了几组实验数据，并根据测量结果作出了“m﹣V”图象，如图丙所示，由图象可知该液体的密度为____kg/m³．