【简答题】若集合A={1,x 2} ,集合B={1,3,x},且A∪B={1,3,x},则x=______.
【简答题】若集合A={x|x 2 -1<0},集合B={x|x>0},则A∩B=______.
【单选题】“受盛化物, 泌别清浊”的功能属于( )
【单选题】根据流体流动的空间特点,以下哪一项属于油气藏分类()
【简答题】In China, traffic keeps to the right. Cars, trucks, buses bikes must all keep to the right side of the . In most other countries, traffic to the left. How can you the roads safer? you cross the road, ...
【多选题】工资是指基于劳动关系,用人单位以货币形式直接支付给劳动者的劳动报酬,一般包括( )
【简答题】若集合A={x|log a (x 2 -x-2)>2,a>0且a≠1}. (1)若a=2,求集合A; (2)若 9 4 ∈A ,求a的取值范围.
【简答题】若全集U=R,集合A={x|x>1},B={x|x>2},则集合A∩(? U B)=______.