问题
单项选择题
ping命令发送以下______个报文。
A) 4
B) 10
C) 32
D) 64
答案
参考答案：A
解析： ping命令的功能是通过发送ICMP报文监听回应报文，检查与远程或本地计算机的连接，默认情况下发送4个报文，每个报文包含字节数据。
搜题请搜索小程序“爱下问搜题”
ping命令发送以下______个报文。
A) 4
B) 10
C) 32
D) 64
参考答案：A
解析： ping命令的功能是通过发送ICMP报文监听回应报文，检查与远程或本地计算机的连接，默认情况下发送4个报文，每个报文包含字节数据。
| In most cases, you can transplant a tree successfully, at any time, if you follow the instructions for planting a tree. The most important thing is to dig out enough roots, but this process is difficult with a large tree. When you dig out the tree, leave a ball of earth around its roots. This ball of earth should measure about a foot wide for every inch of the tree trunk’s diameter. Dig deep enough to avoid cutting off too many taproots. It is wise to call in a professional tree expert to transplant a tree more than a few inches in trunk diameter. |
To decide whether you can successfully transplant a tree yourself, you should ______.
A．select your location carefully
B．measure the ball of earth around the tree roots
C．measure the diameter of the tree trunk
D．cut off as many taproots as you can reach