问题
填空题
设A={x|x<5},B={x|x≥0},则A∩B=______.
答案
联立集合A和集合B中的不等式得:
解得:0≤x<5x<5 x≥0
所以A∩B={x|0≤x<5}
故答案为:{x|0≤x<5}
设A={x|x<5},B={x|x≥0},则A∩B=______.
联立集合A和集合B中的不等式得:
解得:0≤x<5x<5 x≥0
所以A∩B={x|0≤x<5}
故答案为:{x|0≤x<5}
选词填空
The animals are 79 to the desert people in many ways. The desert people eat the meat and drink the milk of the animals. They use their skins to 80 shoes, water bags and even tents(帐篷). They use the camels(骆驼) for 81 things. The people of the desert have to keep 82 from places to place. They must always look for grass or desert plants for their animals. They usually live in the tents. When there is mo more food for their animals, they take down their tents, put them on the camels and move to 83 place. The desert people are very 84 . No man in the desert would ever refuse to help the people in 85 and give them food and water |