3G时,由于RNC间存在IUr接口,因此由RNC控制的通过IUr接口实现的切换称作()。
A.软切换
B.硬切换
C.更软切换
D.软切换还是硬切换由系统决定
参考答案:A
George couldn't remember when he first met Mr. Anderson, but he was sure it was ________ Sunday because everybody was at ________ church.
A./;the
B.the;/
C.a;/
D./;a
健康婴儿1岁,体重10kg。除了母乳喂养外(每天母乳约400m1),每天还要补充多少毫升牛奶,才能保证生长发育所需的蛋白质()
A.450ml
B.500ml
C.550ml
D.600ml
E.650ml