DHCP的报文中含有option字段，它采用固定长度为4个字节。
查看答案
公司申请变更登记，应当向公司登记机关提交哪些文件？
井下临时瓦斯抽放泵站下风侧（）外必须设臵甲烷传感器。
机械式风速继电器的联锁触头采用的是（）开关。
A. 行程
B. 微动
C. 万能转换
D. 自动
As Chief Officer of a vessel underway，it comes to your attention that the vessel is，in some manner，unseaworthy. Under such circumstances the Master is required to take action upon receiving（）.
A. information of such condition from yourself
B. notification of such condition from yourself and the Second Officer
C. notification of such condition from yourself and any other member of the crew
D. notification of such condition from yourself or the Second Officer
微信支付 
支付宝支付