问题
选择题
设集合A={-1，0，1}，集合B={0，1，2，3}，定义A*B={（x，y）|x∈A∩B，y∈A∪B}，则A*B中元素个数是（ ）
|
答案
答案：B
搜题请搜索小程序“爱下问搜题”
设集合A={-1，0，1}，集合B={0，1，2，3}，定义A*B={（x，y）|x∈A∩B，y∈A∪B}，则A*B中元素个数是（ ）
|
答案：B
| 完形填空。 | ||||
| Mary: Hello, this is Mary speaking. Nancy: Hi, Mary. Speaking. Mary: 1 your pictures. Australia is very beautiful. _2 is the weather in Australia? Nancy: It's 3 . Mary: That's great. It's snowy in Beijing. Nancy: It's summer in Australia but winter in Beijing. That's 4 . Mary: Yes, I like winter. Some boys and girls 5 snow. Nancy: Great! I like snow. In Australia it 6 snow. Mary: That sounds bad. Now Beijing 7 very cold. I am 8 the scarf and gloves (手套). Autumn (秋季) is the best season in Beijing. The weather is not too 9 or too cold. Nancy: Autumn here is nice, too. Goodbye! Mary: 10 . | ||||
|