题干
补全短文中所缺的单词。
This is my friend, Sally. There are four people in her family. Her father ____a plane in the sky. He is a ____. Her mother is a teacher. She ____Chinese in a school. John is Sally's brother. He wants to cook nice food. He wants to be a____. Sally wants to help people. She wants to be a ____.
答案(点此获取答案解析）
flies,pilot,teaches,cook,doctor
表示成数字式是（ ）
所表示的平面区域被直线 
分为面积相等的两部分，则k的值是（ ）