A:1
B:-12
C:1或-12
D:-1或-12
设集合 A={x|1x<2},B={x|x>13},则A∩B等于 ( )
下列航海家的远航活动,按时间顺序排列,正确的是( )①迪亚士 ②哥伦布 ③麦哲伦 ④达·伽马
如图,已知AB∥CF,E为DF的中点,若AB=7cm,CF=4cm,则BD= ____cm.
The cost of renting a house in central Jurong is more than in any other area of the city.