根据短文内容，回答下列问题。
   Linda and Mary are good friends. Linda is thirteen. She comes from the U.S.A. Mary is twelve. She's from London(伦敦). They study in the same school, but in different classes. Linda's father teaches English in a middle school. Her mother drives a car. Mary's mother works in an office. Her father is a doctor. Linda can speak English, French(法语) and a little Chinese. Linda's mother likes cooking. She likes eating rice. But Linda' s father doesn't. He likes drinking milk and eating bread. Mary's mother doesn't like cooking. But she likes doing some shopping. She can make nice skirts and dresses. Mary's father likes doing housework(家务).

被国际上誉为"分类学之父"的科学家是:（    ）

下列三幅图片反映的是我国古代不同时期的农具，对其出现的先后顺序排列正确的是（  ）

如图，△ABC的顶点都是正方形网格中的格点，则sin∠ABC等于（　　 ）