【单选题】Hainan is a very large island. It's the second ________ island in China. [ ]
【单选题】设z 1 ,z 2 是复数,则下列命题中的假命题是( )
A.
若|z 1 -z 2 |=0,则 . z 1 = . z 2
B.
若 z 1 = . z 2 ,则 . z 1 = z 2
C.
若|z 1 |=|z 2 |,则 z 1 ? . z 1 = z 2 ? . z 2
D.
若|z 1 |=|z 2 |,则 z 1 2 = z 2 2
【简答题】阅读理解。 Hawaii's Big Island Nickname: Hawaii's Island of Adventure Size: 4,028 square miles Population: 148,677.The most heavily populated areas are Hilo on the east side and Kailua-Kona on the west. Te...
【单选题】设复数z= 2i 1-i ,则 . z =( )
【单选题】设复数z的共轭复数为 . z =1-i(i为复数单位)则 . z - . z z 的值为( )