利用二进制表示子网掩码,其中“1”代表()
A.主机部分
B.网络部分
C.主机个数
D.无任何意义
参考答案:B
尿中出现本周蛋白()
A.过敏性紫癜
B.巨幼细胞性贫血
C.多发性骨髓瘤
D.白细胞减少症
E.类白血病反应
___________catch the first train, he asks his mother to awake him up in the morning
A So as to B In order to C So that D In order that