信息咨询得管理内容有哪些？
In the International Code of signals，a group of three letters indicates（）. ["urgency or an emergency","the vessel's national identity signal","a group from the general signal code","a group from the medical signal code"]
什么是系统集成？系统集成服务的内容有哪些？
If passengers are on board when an abandon ship drill is carried out，they should（）. ["take part","watch","go to their quarters","stay out of the way and do what they want"]
地基施工结束，宜在一个间歇期后，进行质量验收，间歇期由什么确定？
灰土地基施工过程中应检查什么？
