人们约定,整个主机标识部分的二进制编码全为1时,该网络号解释为本地网络的()。
参考答案:广播地址
常用的平面度检测方法有:()、()、斑点法、水平仪法和自准直仪法。
The little boy _______ by us just now. [ ]
A. was taken care
B. took care of
C. was taken care of