问题
判断题
使用交集、并集、差集时，首先必须把物体转化为面域。
答案
参考答案：对
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使用交集、并集、差集时，首先必须把物体转化为面域。
参考答案：对
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| Hello, boys and girls. This is a 1 of my family. 2 Frank. I am twelve. I am a student in No 2 Middle School. This is my father. 3 name is Dale Brown. He is a teacher in my school. And this is my mother. She is 4 nurse (护士). She works in a hospital (在医院工作). The girl is my little sister. She's 5 years old. Who is that woman near my father? Oh, she's my 6 . She is 7 father's sister. My grandparents aren't in the photo. 8 are in the USA. I have a dog. 9 name is Bobby. I love my 10 and I love my dog, too. | |||
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