CDMA2000系统结构与IS-95相比,有哪些不同?
参考答案:
针对IS-95软切换造成信道利用率低不足的问题,CDMA2000采用了更为有效的相对门限判断方法。
After his wife was killed in the earthquake, it was his daughter _____ managed the house and accompanied him
A.whom
B.that
C.which
D.what
根据增值税法律制度的规定,下列各项中,应当征收增值税的有( )。
A.典当业的死当销售业务
B.集邮商品的生产、调拨
C.邮局销售集邮商品
D.邮局发行报刊