$\frac{2}{5}$ ÷10表示把 $\frac{2}{5}$ 平均分成10份，求这样的一份是多少.。

阅读下列短文，根据短文内容填写表格。(每空限填一词)     

    Hi! Do you know the three children? They are in a happy family. Xiao Xue is a helpful girl. She is beautiful. She likes studying. She studies very hard. She gets up early and finishes her breakfast quickly .Then she rides her bike to school . Liu Xing is a little lazy. He gets up late and then washes his face, brushes his teeth in a hurry. Then he goes to the bus stop without breakfast. He usually plays basketball after school. In the evening, he seldom (很少)does homework. He goes to bed late. Xiao Yu is a lovely boy. He gets up very slowly and then he usually takes a shower(淋浴)at home before breakfast. After that, he goes to school in his father’s car. He likes watching TV in the evening.

达尔文认为在加拉帕斯雀进化过程中起决定作用的是（ ）