∵（1+i）2=2i，1i=-i，∴2+4i(1+i)2=2+4i2i=2-i．
故答案为：2-i．
____ through Africa, the infectious disease jumping from children to adults killed 1,000 people.
A．Swept
B．Having been swept
C．Having swept
D．Sweeping
遗精初起，治疗时应注意（）。
A.不宜滋阴降火
B.不可清热化湿
C.不宜过早固涩
D.不宜用安神之品
E.以上都不对
